Asia’s Rout Meets “Not Again” Moment As Oil Spike And BOJ Jitters Bite

Asian stock markets are facing their sternest test of 2026 as a deep rout triggered by the Middle East war, surging oil prices and renewed uncertainty over Bank of Japan policy tests investor stamina after last year’s AI‑fuelled gains.

On 4 March, Reuters reported that “Asia’s stock rout deepened” as investors braced for an energy shock, dumping shares in chipmakers and other growth names on fears that spiking oil prices and wider conflict could derail the global recovery. The sell‑off followed Iran’s escalation and the effective closure of the Strait of Hormuz, which pushed oil sharply higher and revived stagflation worries.

CNBC data show that on 3 March Japan’s Nikkei 225 tumbled about 3.1%, while the Topix fell a similar amount. Hong Kong’s Hang Seng was down around 1% in late trade, and China’s CSI 300 dropped roughly 1.5%. Australia’s S&P/ASX 200 slid 1.34%, reversing gains from earlier in the week as energy and resource names struggled to offset broader weakness.​

Market psychology is fragile after February’s volatility. Reuters had already highlighted how concerns over AI‑driven disruption and lofty valuations weighed on stocks even before the conflict escalated. The new oil shock adds a macro headwind to an already jittery environment, particularly for energy‑importing economies like Japan, South Korea and much of Southeast Asia.

Monetary‑policy uncertainty compounds the pressure. A separate Reuters report cites sources saying that the Iran conflict has “raised the odds” that the Bank of Japan will forgo a long‑anticipated rate hike at its March meeting, as policymakers need more time to gauge the conflict’s economic impact and market volatility. That leaves investors guessing about the timing and pace of policy normalisation in Japan, a key variable for global yield curves and currency trades.

Saxo Bank’s 5 March “Asia Market Quick Take” suggests that some stabilisation may be in the offing. The note highlights a rebound in US equities, with the S&P 500 up 0.7% and Nasdaq 100 up 1.4% on strong tech sector gains and easing oil prices after reports—later denied by Tehran—that Iranian operatives had sought talks to end the conflict. Futures for Japan, Australia and Hong Kong pointed higher, while South Korea’s Kospi was trading about 8% above Wednesday’s levels, implying a sharp bounce from prior declines.​

Emerging‑market specialists quoted by Reuters argue that, despite the shock, many emerging markets—including in Asia—may prove more resilient than feared thanks to improved macro fundamentals, deeper local‑currency markets and more orthodox monetary policy compared with past crises. However, they caution that differentiation will be key: countries with large energy imports, fragile external balances or political uncertainties could still see outsized damage.

For investors in the Gulf and Asia, March is turning into a “decision month”: whether to treat the rout as a buying opportunity in structurally strong markets like Japan, South Korea and select ASEAN names, or to reduce risk amid uncertainty over energy, conflict and central‑bank paths.