Global equity markets closed out the week of March 9–13 with their deepest broad-based losses since the COVID crash of March 2020, as the Iran oil shock compressed corporate earnings outlooks across energy-importing economies and central bank policy paths grew increasingly uncertain. The S&P 500 shed 1.52% on Friday to close at 6,672.62, the Nasdaq fell 1.78% to 22,311.98, and the Dow Jones Industrial Average declined 1.56% to 46,677.85 — all three major US indices now at year-to-date lows.
The week's arc was defined by violent intraday swings driven less by economic fundamentals than by geopolitical signals. A sharp mid-week relief rally on March 10 — the Nikkei surging 2.9%, South Korea's KOSPI jumping 5.4%, the DAX adding 2.0% — evaporated almost entirely by Friday as Iran's new Supreme Leader reiterated the country's commitment to keeping the Strait of Hormuz restricted. Brent crude settled Friday at $100.68 per barrel, holding near the psychologically significant $100 level for a second consecutive session. Wall Street posted its third consecutive session of losses as the week closed, with the sell-side narrative shifting from "temporary disruption" to something more structurally corrosive.
The Week's Ledger: Panic, Relief, Then Renewed Pressure
The week opened in the shadow of the prior five sessions, during which Europe's Stoxx 600 had already shed roughly 6% and Japan's Topix had lost a comparable amount. The catalyst for mid-week optimism arrived on March 10, when President Trump described the US-Iran conflict as a "short-term excursion" and advisers floated the possibility of targeted sanctions relief. WTI crude fell intraday to $85.40 on the headlines, triggering a coordinated short-cover rally across European and Asian markets. The London FTSE added 1.1%, Paris's CAC 40 gained 1.9%, and Australia's ASX 200 rose 1.1%.
That optimism proved short-lived. Friday brought a renewal of pressure as Iranian officials made clear no ceasefire terms were on the table, and Treasury Secretary data showed US consumer price expectations ticking higher on energy costs. The US 10-year yield settled at 4.267% — a noteworthy dynamic: in most prior risk-off episodes, Treasuries rally as equities sell. This week, they moved in the same direction as stocks, reflecting the BlackRock Investment Institute's characterization of the current environment as "an inflationary supply shock, not a demand-led growth slowdown." When inflation expectations drive the selling, safe-haven bond bids do not arrive on schedule.
Asia Leads the Losses: Importers Versus Exporters
The week's most pronounced damage concentrated in Asia's oil-importing economies. India's Nifty 50 fell 1.33% on Friday to 23,325.45, while the BSE Sensex shed 916 points to 75,117.81, a 1.21% decline. In the March 13 session alone, India's broader market shed approximately ₹6.5–7 lakh crore (roughly $75–80 billion) in market capitalisation, according to Times of India market data. Japan's Nikkei 225 closed at 53,819.61, down 1.16%, while USD/JPY traded near 159.50 — prompting fresh warnings from Japanese government officials about excessive yen weakness, a currency dynamic tied directly to the energy import bill.
South Korea's KOSPI — the most oil-import-exposed of Asia's major exchanges — logged an approximate 11% decline from its pre-week level at the trough, before partial recovery. The structural reason for Asia's outsized vulnerability is not simply oil-price sensitivity but refinery architecture: facilities across Japan, South Korea, India, and Taiwan were built specifically to process Gulf crude, making rapid substitution difficult even when alternative supplies theoretically exist. The US sanctions waiver extending to all nations with stranded Russian crude at sea — a 30-day licence issued March 12 covering approximately 124–125 million barrels across roughly 30 global locations — offered some near-term supply relief, but analysts noted the volume falls well short of the 20 million barrels per day ordinarily transiting the Strait of Hormuz.
Australia sat in an unusual position. The Reserve Bank of Australia raised its cash rate 25 basis points to 3.85% at its first 2026 meeting — its first hike since November 2023 — placing it among the central banks forced to tighten into an oil shock. A Reuters poll as of March 13 expects a further hike to 4.10% at the March 17 meeting, followed by 4.35% by end-2026, as domestic fuel inflation amplifies broader CPI pressure.
The Emergency Response: IEA, SPR, and the Russia Waiver
The coordinated institutional response to the supply disruption was significant in scale, if uneven in market impact. The IEA's 32 member states pledged a combined release of approximately 400 million barrels from strategic reserves, with the US Department of Energy committing 172 million barrels from the Strategic Petroleum Reserve. The IEA characterised the disruption as "the largest oil supply disruption in history" — a framing that underscored both the seriousness of the intervention and its insufficiency to fully stabilise price expectations.
The US Treasury's 30-day licence for Russian crude stranded at sea as of March 12 — the second such waiver after a March 5 India-specific exemption — represented a pragmatic acknowledgement that sanctioned supply is preferable to a $120 oil price. Valid until April 11, the waiver unlocks tanker cargoes sitting off the coasts of roughly 30 countries. The market's muted response — Brent eased less than 1% on the news — suggested participants had already partially priced in the geopolitical flexibility. The IEA has also noted that five pipeline bypass routes around the Strait of Hormuz exist, but that their combined capacity cannot replicate Hormuz volumes at scale.
What to Watch
Several data releases and central bank decisions in the coming week will test whether equity markets can stabilise or whether the week's losses deepen. The Reserve Bank of Australia is expected to deliver a second 25 basis point increase on March 17, taking its cash rate to 4.10%. The ECB meets March 19: at its February meeting it held rates steady, but with oil-driven inflation now adding an estimated 0.4–0.5 percentage points to eurozone CPI projections, the institution faces renewed pressure to revise its macro outlook. The geopolitical backdrop also shapes Japan's 10-year yield trajectory — Friday's close at 2.234%, up 5.3 basis points on the session, signals mounting pressure on the Bank of Japan's already contested policy stance.
The week demonstrated that the Iran oil shock has moved beyond its initial acute phase into a more sustained macro repricing. BlackRock's Investment Institute has framed the disruption as one measured in "weeks, not months" — but with both Friday's equity closes and bond markets rejecting the safe-haven trade simultaneously, the path to stabilisation runs through diplomacy rather than monetary policy. US policy posture in the Gulf remains a central variable for how quickly that diplomatic channel reopens.
