Houthis take Perim island and complete Yemen's Red Sea coastline as Saudi Arabia shuts its East-West pipeline; Brent ends the week above $100

0. Weekly Arc

Five days after the Sep 5 US strikes on three Iranian tankers, the arc ran one way: Brent broke $100 on Sep 9 after US forces sank five more Iranian tankers, and the Sep 10 Houthi capture of Mocha extended the shock to a second chokepoint. Sep 11–12 delivered the sharpest territorial turn yet — Perim island and the effective completion of the Houthi takeover of Yemen’s Red Sea coast — plus the precautionary shutdown of Saudi Arabia’s East-West pipeline. Two counter-signals persist against that: an Iran–Oman understanding on a temporary Hormuz shipping route and the Sep 14 GCC–Iran meeting in Salalah.

1. Situation Overview

The past ~24 hours are a further escalation on the physical layer, with the first genuine softening in prices. The Houthis reached the strategic island of Perim in the Bab el-Mandeb on Friday, according to four Yemeni government sources ^[1]; the capture of Mayun, also known as Perim, was confirmed by a senior military official with Yemen’s internationally recognized government and by a Houthi official ^[2][3], and the group effectively completed its rapid push to control Yemen’s Red Sea coastline ^[4]. Separately, Saudi Arabia said Friday it shut down its cross-country East-West oil pipeline as a “precautionary measure” after attacks the day before ^[2], with the Saudi Energy Ministry saying the line had been “targeted multiple times” ^[5]; the kingdom’s Foreign Ministry said the drones came from Iraqi territory ^[6], and early Saturday Iraq’s government said Prime Minister Ali al-Zaidi dismissed the commander of the operations command in Maysan province after authorities determined the attacks were launched from a site there ^[2]. Prices whipsawed: oil briefly topped $108 on Friday after the Houthi escalation ^[5], with The New York Times reporting a spike to about $110 ^[7], before Brent retreated roughly 3.5% from that high to around $103 ^[8] and settled nearer $105 in early-afternoon trading ^[7]; WTI traded as high as $104 before falling to about $99 ^[7], having touched $98.48 intraday ^[9]. Global oil prices still appeared set to end the week above $100 for the first time since mid-May ^[4], with the largest weekly gain since July and year-to-date gains above 70% ^[8], and prices roughly 50% above prewar levels ^[5]. US diesel hit a record: the AAA average jumped to $6.06 a gallon, up 60% since Feb 28, while gasoline averaged $4.30, up 44% ^[7]. The macro channel is live — the 10-year Treasury yield held at 4.95% and the 2-year at 4.61% with US inflation at 3.4% annual ^[7], and ING wrote that markets are now pricing two and a half further rate hikes ^[7]. Equities split: the S&P 500 rose 1% in midday Friday trade on track to snap a four-day losing streak, Europe’s Stoxx 600 rose about 1%, while Japan’s Nikkei 225 and South Korea’s KOSPI fell nearly 2% ^[7]. Net characterization: escalating militarily and geographically, with the first visible diplomatic off-ramp pulling headline prices lower.

2. Key Parties’ Positions

• [ESCALATED] Negotiation progress: Iran’s Foreign Ministry spokesman, Esmail Baghaei, said Friday a regional meeting is planned between Iran and other Persian Gulf countries including Oman and Iraq, to be held Monday in Oman and to include discussion of prior Iran–Oman talks on shipping in the Strait of Hormuz ^[2][9]; Baghaei said Iran and Oman have already reached an understanding on a temporary shipping route in the Strait of Hormuz ^[9], while also saying Iran remains committed to maritime security but cannot guarantee shipping safety while the US naval blockade and “economic war” continue ^[9]. The Gulf Cooperation Council’s six foreign ministers plan to meet Iranian Foreign Minister Abbas Araghchi on Sept 14 in the Omani coastal city of Salalah, in an Oman-led push whose goals include winning support for a temporary arrangement to regulate commercial shipping through the strait ^[9]; UBS noted the GCC–Iran meeting scheduled for Monday in Oman to discuss a new Hormuz shipping framework ^[10], and per Bloomberg the six GCC states are considering talks with Iranian officials next week on Hormuz transit ^[8]. Iran’s demands remain the end of the US naval blockade of its ports and the release of frozen assets overseas ^[5], and the IEA said the continuing impasse in US–Iran negotiations delays any normalisation of flows into next year ^[7]. The foreign ministers of Iran and Saudi Arabia spoke Thursday about diplomatic efforts to “restore stability” to the region, per Araghchi ^[3].
• [NEW] US / main pressuring party: President Donald Trump, speaking on Fox News’ “The Ingraham Angle” on Sept 10, shrugged off the idea of increasing military pressure on Iran, saying “Maybe I don’t do that because of the election” ^[11]; the AP characterizes him as reluctant to widen an already unpopular and stalemated Middle East war ahead of congressional elections ^[11]. Per The New York Times, Trump said this week he believed the war in Iran would not end until after the US midterm election in November, but claimed gas prices would come “tumbling down” after the voting ^[5]; he has separately acknowledged gas prices are likely to stay high through the midterms ^[12] and recently dismissed the conflict as “small potatoes” ^[12]. [ESCALATED] In the past week US forces disabled or destroyed at least eight Iranian tankers, according to Windward’s Michelle Wiese Bockmann ^[5]; US forces remain heavily deployed around the Strait of Hormuz, blockading Iran and trying to prevent attacks on shipping ^[11], a deployment that has strained military resources ^[12]. [NEW] Washington now requires tankers transiting the Strait of Hormuz to sail only during specified time windows in order to receive military protection: since May it has provided air cover to ships taking the southern route along the coast of Oman, shipowners must apply to the US Naval Cooperation and Guidance for Shipping (NCAGS), which supplies navigation coordinates, and in early September those windows were compressed to two specific slots per day, according to NCAGS emails seen by media ^[13].
• [NEW] Iran / counterparty: An Iranian Foreign Ministry spokesperson said Strait of Hormuz navigation cannot be guaranteed while US maritime blockades and economic warfare continue ^[14][9]. The spokesperson for Iran’s Revolutionary Guard on Wednesday called for any negotiated settlement with the US to include Yemen — the first explicit reference to that front ^[3]. Iran’s government earlier Friday called for an end to Saudi Arabia’s blockade of Houthi-held areas in a show of support for its ally ^[3], and the Iranian Foreign Ministry called for a return to negotiations between Saudi Arabia and the Houthis ^[3]. Iran continues to deny arming the rebels ^[2]. [ONGOING] Iran said it attacked 10 ships near the Strait of Hormuz on Wednesday ^[15][16][1].
• [NEW] Israel: Israeli Defense Minister Israel Katz said Friday that his country’s military has completed the destruction of tunnels in the strategic Ali Taher ridge in southern Lebanon, which he said were built by Hezbollah with Iranian funding ^[2]; the ridge has been the site of clashes between Israeli forces and Hezbollah in recent weeks, and residents nearby heard loud explosions and felt the ground shaking Thursday ^[2]. Israeli forces continued to demolish houses in villages under their control in southern Lebanon, and residents displaced from the coastal village of Mansouri watched Friday as Israeli drones carried boxes of explosives to be dropped on their homes ^[2]. The Lebanese and Israeli ambassadors will meet at the US State Department next week to discuss developments and implementation of a trilateral framework, with the next round of formal discussions in Rome in October, the State Department said Friday ^[2].

3. Military Actions

• [ESCALATED] Proxies (Houthis / Bab el-Mandeb front): The Houthis reached Perim island on Friday per four Yemeni government sources ^[1]; the capture of Mayun/Perim was confirmed by a senior military official with Yemen’s internationally recognized government and a Houthi official ^[2][3], after their seizure of the port city of Mokha on Thursday ^[15][16][4] and an advance on the strategic coastal town of Dhubab ^[4]. Houthi forces effectively completed their takeover of Yemen’s Red Sea coastline ^[4], with as much as 130 km (81 miles) of coastline captured “according to some estimates” ^[17]; a local government official and eyewitness told AFP the Houthis had completed their takeover of the Bab el-Mandeb area and Mayun island ^[18] (single source). Saudi Arabia struck the airport in Mokha, a Houthi broadcaster said, with no reports of damage or deaths ^[3]. Houthi spokespeople put the offensive that began Sept 3 at six districts in Taiz and Hodeidah covering 5,400 sq km within nine days, with hundreds of enemy personnel killed, wounded or captured, 32 Saudi aircraft sorties intercepted and nine drones shot down — all unilateral Houthi claims ^[19][9] (single source / unverified). The Houthis have launched missiles and drones at cities and oil facilities in southern Saudi Arabia ^[18], and satellite images show an apparent Houthi missile-and-drone attack on Saudi Arabia’s East-West pipeline ^[17]. The Houthis vowed “escalation for escalation” in the confrontation with Saudi Arabia while declaring maritime navigation “safe for all companies except for Saudi vessels” ^[3]; a Houthi military statement said navigation is safe for all companies except Saudi vessels, which “have already been subject to a blockade” ^[2][20][17].
• [NEW] Iraq-origin strikes on Saudi Arabia: A drone attack launched from Iraqi territory struck Saudi Arabia’s East-West oil pipeline ^[11][6]; per Reuters and Bloomberg, the pipeline at Riyadh and Medina was attacked multiple times on Thursday morning, causing injuries and facility damage ^[6]. A US official said preliminary analysis shows the pump station adjacent to the pipeline was attacked and that the attack may have been carried out by drones from Iraq ^[9]; satellite images show one pump station with signs of large-scale fire damage on Friday and a smaller fire with thick black smoke near another pump station on Thursday ^[9]. Saudi Arabia’s Foreign Ministry said the drones came from Iraqi territory ^[6]; at the request of Iraq’s prime minister Riyadh decided not to retaliate for now while reserving the right to take all necessary measures to safeguard sovereignty, security and critical infrastructure ^[6], and Iraqi military spokesperson Numan said Prime Minister Zaidi ordered an investigation and would take legal action against anyone involved ^[6]. Satellite imagery on Friday showed a 60-mile smoke plume along the pipeline route, with fire-detection data showing high-temperature readings at several pipeline sites, though it was unclear what transpired and neither Saudi officials nor the Houthis commented ^[4].
• [ESCALATED] US: Beyond the confirmation that US forces disabled or destroyed at least eight Iranian tankers in the past week ^[5], the US blockade around Hormuz continues ^[11] and the US has carried out limited strikes on Iran’s coastal areas ^[12].
• [ESCALATED] Iran: Iran has retaliated with deadly attacks against vessels passing through the strait near Oman ^[5] and has continued to attack ships in the strait ^[12]. Since the war began at the end of February, at least 22 sailors have been killed in the Middle East, and at least 23 ships were hit in the waterway near Oman in July and August ^[5].
• [NEW] Saudi Arabia: In addition to striking Mokha airport ^[3], a Saudi-led coalition has carried out air strikes on Houthi-controlled areas in western Yemen in support of pro-government forces ^[18].

4. Strait of Hormuz Transit Status

• [ESCALATED] Control-status change: The US has institutionalized escorted transit — tankers must apply to NCAGS, receive navigation coordinates, and sail within daily recommended windows that in early September were compressed to two specified slots, with one NCAGS email noting that “it has proven that transiting at night is not the safest time of day” ^[13]. Iran continues to demand that ships pass through a vetting lane near the Iranian coastline ^[16], while the US military has guided tankers through the strait in defiance of that demand ^[15][16]. Increased attacks on shipping in the strait this week have put use of the US route on hold ^[15][16]. On the second chokepoint, Houthi moves to close the 17-mile Bab el-Mandeb channel have made the Red Sea route more complicated ^[3], and the Bab el-Mandeb is just 12.5 miles wide at some points, with shipping lanes running less than three miles from Perim Island, well within range of Houthi missiles and drones ^[21].
• [ESCALATED] Transit data: Preliminary ship-tracking data showed Hormuz vessel transits falling to seven on Thursday from 11 the previous day, well below the 10-day average of 15 ^[22]; of the seven, two Panama-type ships exited (one carrying fertilizer, one empty) and five entered, including a medium-range tanker fully loaded with heavy refined products ^[22]. Kpler separately recorded just nine ships as having passed through the strait on Thursday ^[5]. An average of 19 ships per day have transited in September, down from 20 in August and a high of 34 in June, against roughly 130 vessels a day before the war, according to ship-tracking companies ^[5]. The IEA put August Hormuz transit volumes at only 7.6 mb/d, 13.1 mb/d below pre-war levels, with cumulative export losses through the waterway approaching 2.8 billion barrels ^[23]. UBS’s tracker estimated weekly crude and product exports including bypass routes at close to 13 million bpd — far below the pre-conflict level of over 20 million bpd but the highest since mid-July — with crude “dark ship” transits through Hormuz above 7 million bpd, product flows holding around 1.5 million bpd, Gulf crude loadings excluding Iran above 10 million bpd in recent days (September-to-date average 6.5 million bpd versus August’s 5.5 million), Yanbu loadings averaging 3.1 million bpd in September against August’s 1.5 million and July’s 4.2 million, bypass route loadings including Fujairah at 5.5 million bpd September-to-date versus 3.4 million in August, and Gulf product loadings falling back below 1 million bpd ^[10]; Iranian crude loadings have gone unrecorded for 16 consecutive days, the longest stall since the conflict began ^[10]. On the Bab el-Mandeb, 26 commodity vessels passed on Thursday — 10 entering and 16 exiting — slightly below the 10-day average of about 27 ^[22], after only six vessels transited around 15:00 on Sept 10 against 30 on Sept 9, 26 on Sept 8 and 29 on Sept 7 ^[19][9]. Traffic overall through the Bab el-Mandeb remains down some 60% from levels before the attacks ^[15][16][3], and only two Saudi Arabian cargoes passed through in the past week per Kpler ^[5]. Saudi oil passing the Bab el-Mandeb bound for Asia plunged from around 3.4 million barrels a day in June to just 128,000 in August, recovering to some 700,000 in September ^[12][11].
• [ESCALATED] Shipping / insurance signals: The cost of shipping oil in the largest tankers hit record highs this week after the biggest wave of attacks since the war began: the VLCC rate from the Gulf of Oman to China reached around 450 on a Worldscale basis — roughly $11.50 per barrel, the highest since the route was launched earlier this year — and West Africa-to-Asia VLCC rates also hit records, per Baltic Exchange data ^[19][1]. Vortexa analyst Ioannis Papadimitriou said renewed attacks between the US Navy and Iran continue to push Gulf freight rates to new highs and that the higher risk of operating in and around the Middle East Gulf is driving Gulf of Oman rates higher in fear of Iranian retaliation, which thins available tankers ^[19][1]. Tanker charter costs have in some cases risen above $100,000 per day during the current turmoil ^[15][16]. With the Houthis threatening the Bab el-Mandeb, Saudi tankers have turned northwest from Yanbu toward the Suez Canal instead of southeast ^[16], some 70% of Yanbu crude exports are now heading that way by pipeline or tanker according to Lloyd’s ^[16][15], and that route enables the Saudis to redirect as much as 3 million barrels per day ^[16] — though it more than doubles transit time to an Asian destination like South Korea, from 24 days to 54 days, per Kpler’s Victoria Grabenwöger ^[16][15]. The IEA reported Red Sea oil loadings fell from 3.8 million barrels per day to 2.2 million in August, with overall Saudi supply down 2.3 million bpd to 6 million barrels, the lowest in three decades ^[15][16]. UBS noted that because Bab el-Mandeb flows are below normal, most Saudi export cargoes are being shipped north via the Suez Canal/SUMED pipeline ^[10].

5. Asset Implications

Asset	Direction	Horizon	Driver	Anchoring fact
Brent crude	range-firm above $100; sharp intraday ↓	days–weeks	Two-chokepoint supply shock competing with a concrete diplomatic off-ramp; record diesel keeps the product leg tight	§1 (spike to ~$110 then back to ~$105; weekly close above $100 first since mid-May; largest weekly gain since July); §4 transit and freight
Gold / precious metals	→ (firm bias)	days	Haven bid from a widening war plus record fuel-driven inflation, capped by the rate channel at 4.95% 10-year	§1 macro prints; §6 tail risks
Global equities / risk sentiment	mixed, regionally split	days	Oil-driven inflation vs. a market beginning to trade the diplomatic path; Asia down ~2% while the S&P 500 and Stoxx 600 rose	§1 (S&P +1%, Stoxx 600 +1%, Nikkei/KOSPI −~2%)
USD / haven currencies	→ (firm bias)	days	Oil-inflation channel plus ING’s “two and a half further hikes” pricing keeps the dollar supported; next week’s Fed meeting is the swing	§1 (10-year 4.95%, 2-year 4.61%, inflation 3.4%); §6 Fed
Energy / shipping value chain	↑↑	weeks–months	Record VLCC rates, escorted-window transits, Saudi rerouting to Suez at 70% of Yanbu exports and the pipeline shutdown	§4 freight, routed-window and rerouting facts

Mechanism read: This is still a supply-shock tape, but for the first time in a week the shock is being contested by an actual diplomatic mechanism rather than only by inventories. The two physical legs are no longer substitutes: Hormuz is administered rather than open — the US protects transit inside two daily windows, which is a rationing regime in all but name — and the Bab el-Mandeb leg that absorbed Saudi barrels has now been narrowed from above and below, by the Houthi seizure of Perim and by the unprecedented precautionary shutdown of the East-West pipeline that carries crude from the eastern fields to Yanbu. That combination removes the redundancy the market had been pricing: 70% of Yanbu crude exports are being pushed onto the longer Suez route and up to 3 million bpd has to be redirected there, at the cost of more than doubling voyage times to Asia. The cleanest tell that the physical tightness has not eased is the freight and product layer, not the headline barrel: a record Worldscale 450 (~$11.50/bbl) on the Gulf of Oman–China run, charters above $100,000/day, and a US diesel average at a record $6.06.

The demand-and-policy channel is now the counterweight, and the IEA has made it explicit. The September Oil Market Report raises the 2026 global deficit estimate to 1.7 mb/d and flips Q4 from a 0.2 mb/d surplus to a 2.3 mb/d deficit, cuts the demand forecast to a 2.5 mb/d contraction — the largest since the pandemic — and no longer expects Hormuz to reopen for shipping this year, while warning that the price rise “pales in comparison” with refined products, where tightness is “most acute.” That framing matters for cross-asset pricing: if the constraint is diesel and middle distillates rather than crude, the inflation pass-through is faster and more politically charged than a crude-only shock, which is why the record diesel print feeds straight into next week’s Fed meeting and into a US inflation rate stuck at 3.4% with the 10-year at 4.95%. The equity divergence — Asia down ~2%, the US and Europe up ~1% — is consistent with a market treating the Salalah meeting as a genuine probability of a transit arrangement rather than a headline risk-off impulse.

6. Contrarian & Watch Signals

• Contrarian & tail risks: The consensus is that the second chokepoint and the pipeline strike are escalation; several things point the other way. (1) The physical data improved even as the headlines worsened. UBS’s tracker put regional crude and product flows including bypass routes at their highest since mid-July despite the attacks, driven by dark transits and the Yanbu restart — so the barrels are moving more, not less, and the market’s decision to sell Friday’s spike even while the pipeline burned shows it is trading the diplomatic path rather than the disruption. (2) “Full control” of the Bab el-Mandeb is contested. Andreas Krieg argues that even control of Mokha, Dhubab and Perim would not give the Houthis sovereign control of the entire strait because the western littoral remains outside Yemen, and that the notion of full control should be approached “cautiously”; Richard Meade of Lloyd’s List says the advance “doesn’t change the immediate risk profile” because Saudi and Israeli shipping is already high-risk. (3) The Houthi reassurance may hold or fray, and shipping is skeptical — the group says navigation is safe for all but Saudi vessels, and Craig suggests the Houthis may refrain from indiscriminate attacks for fear of a repeat of Operation Rough Rider, but the sincerity of a Friday-afternoon statement is not taken at face value. (4) Iran’s own leverage is double-edged. The Chicago Tribune’s framing is that the US has loosened Iran’s grip on Hormuz and virtually halted its oil exports while the war remains unwinnable: Mona Yacoubian says “the U.S. is not winning in the war with Iran,” Ali Vaez says Washington “still lacks a theory of victory,” and Danny Citrinowicz argues Tehran will keep climbing the escalation ladder rather than back down. (5) Second-order and fiscal linkage. The war has cost US taxpayers more than $37.5 billion with 18 service members dead, is expected to weigh on Republicans in November, and Saudi room for restraint is narrowing even as Riyadh says it wants to avoid another 2015-style war; Saudi interceptor stocks are likely thinner because of the US–Iran conflict per ACLED’s Sherwan Hindreen Ali, and the Houthi advance now attacks both southern Saudi territory and the kingdom’s Red Sea strategic depth simultaneously. (6) A novel and unpriced channel: Anthropic said it blocked users in northern Yemen who were using its AI models to pursue precision, long-range ballistic and hypersonic missiles — with no evidence they succeeded — a reminder that capability diffusion, not only territory, is what changes the threat envelope.
• Key watch signals: Whether Monday’s Oman meeting produces a finalized arrangement, given that Tehran already claims an Iran–Oman understanding on a temporary shipping route — formalization would break the premium, while a failure to appear or a collapse of the framework would re-price it. Whether Brent holds a weekly close above $100 rather than fading after spiking toward $110. Daily Hormuz prints: whether sub-10 vessel days persist against the 10-day average of 15, and whether the two daily escorted windows function without incident — a successful cluster of VLCC or product-tanker crossings would validate the higher official flow claims, while any interdiction under Iran’s vetting-lane demand would confirm it. Whether Bab el-Mandeb transits slide from 26 toward single digits and whether Houthi threats expand beyond Saudi-linked vessels. Whether the East-West pipeline restarts and what Iraq’s Maysan investigation concludes — a sustained outage converts a bypass into a second constraint. The IEA’s Q4 2.3 mb/d deficit and 2.8-billion-barrel cumulative export loss as the institutional anchor for how long the premium persists. Next week’s Fed meeting against inflation at 3.4%, the 10-year at 4.95% and market pricing of two and a half further hikes. Whether Washington shifts from non-kinetic support to direct strikes after Trump’s refusal, and whether Saudi Arabia moves from restraint to retaliation.
• Source quality control: The pipeline attack has no confirmed attribution — CNN says it is still unclear who carried it out and whether the pipeline itself was damaged, and at least six of nine satellite-detected fires near the route appeared to correspond to flare pits, which are normal facilities, so not every detected fire implies an attack. Safeguarding against over-reading: the Houthi casualty and territorial figures (5,400 sq km, 32 sorties, nine drones) are unilateral Houthi statements that cannot be independently verified, and the 130 km coastline figure is qualified only as coming from “some estimates.” The Perim capture rests on a government military official and a Houthi official speaking anonymously ^[2][3] and on four Yemeni government sources ^[1], with AFP’s version a local official plus eyewitness ^[18] and witnesses’ account of fighters moving onto the island lacking immediate Houthi confirmation ^[18]; Saudi officials declined to comment to AP ^[3] and the Saudi government and White House did not respond to requests for comment ^[11]. The Hormuz transit-window details come from NCAGS emails seen by media rather than a US Navy statement ^[13], and the transit counts exclude vessels sailing with AIS transponders switched off, so actual traffic may be higher ^[22]. Reported flow estimates conflict by methodology and magnitude: Kpler’s nine ships on Thursday versus the separate seven-ship reading, and Saudi August output appears as 6.0 mb/d on IEA data, 6.2 mb/d Saudi-reported and 7.3 mb/d per OPEC secondary sources. The “safe navigation” assurance from the Houthis may not last ^[4], and the pipeline-area smoke and high-temperature readings drew no comment from either Saudi officials or the Houthis ^[4]. The Financial Juice item on Hormuz navigation is a single-source social post ^[14].

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Appendix: Further Reading

• ^[20] BBC — Houthi gains around Bab el-Mandeb raise leverage; “as much leverage as a nuclear bomb,” two chokepoints now covered
• ^[17] BBC — How a rapid Houthi advance put Iran-aligned forces astride a second chokepoint, and why shipping is vulnerable
• ^[21] The New York Times — Perim’s position under three miles from the shipping lanes, within missile and drone range
• ^[24] Bloomberg — Riyadh’s stark choice: escalate a campaign that has failed for years, or tolerate greater Houthi leverage over the Red Sea route
• ^[25] WSJ — Chevron CEO Mike Wirth says global oil inventories and market buffers have “largely now played out”
• ^[26] The Wall Street Journal — oil slipped in early European trading Friday as traders weighed risks to Middle East crude exports
• ^[12] Chicago Tribune — the US has loosened Iran’s grip on Hormuz but the war is far from over, with no diplomatic progress since June
• ^[13] Gelonghui (格隆汇) — the mechanics of US-supervised Hormuz transit windows and the NCAGS application process

This report is intelligence & mechanism analysis, not investment advice.