Wall Street fades on Iran ceasefire jitters; Brent +3.8% into 22 April ASX open

Sentiment: mixed ASX 200 prior close: 8,949.4

The S&P 500 closed at 7,064.01 on 21 April 2026, down 45.13 points or 0.63%, as the US-Iran ceasefire approaches expiry on 22 April with peace talks stalled. Brent crude jumped 3.79% to US$93.86 on continued Strait of Hormuz closure, placing energy in focus for today's ASX open. The VIX climbed to 19.50, up 3.34%.

Overnight Wall Street

• S&P 500: 7,064.01 (-0.63%)
• Nasdaq: 24,259.97 (-0.59%)
• Dow: 49,149.38 (-0.59%)
• VIX: 19.50 (+3.34%)

All but three S&P 500 sectors finished lower on 21 April. Utilities lost 1.5% and real estate 1.3%, the two worst-performing groups as long-duration rate-sensitive names came off. Reports that Vice President JD Vance's Iran trip was paused over Tehran commitment concerns drove equities lower through the afternoon before a partial bid into the close.

Mega-cap tech weighed on Nasdaq, with the index shedding 144 points. The 0.59% aggregate decline understates internal dispersion — energy was the single sector materially higher on the Brent move, leaving index drag concentrated in rate-sensitive and defensive names.

Commodities & FX (AU-relevant)

• Brent: US$93.86 (+3.79%)
• WTI: US$90.22 (+3.20%)
• Gold: US$4,738.50/oz (-1.87%)
• SGX iron ore 62%: ~US$107/t (flat)
• Copper: US$6.017/lb (-0.48%)
• AUD/USD: 0.7149 (-0.39%)

Energy led the overnight commodity move as the Strait of Hormuz stayed closed ahead of the ceasefire expiry. Brent traded as high as US$96 intraday before settling at US$93.86. Gold gave back 1.87% as USD firmed into Treasuries rather than bullion. AUD/USD at 0.7149 benefits USD-earners on the ASX — every 1c lower in AUD/USD adds roughly A$30m to CSL.AU FY26 NPAT on consensus, with similar directional impact for RMD.AU and CPU.AU.

Key themes for ASX open

• WDS.AU closed at $34.93 on 21 April — a multi-year high and +51% YTD. Overnight Brent +3.79% adds to the Iran-linked oil premium into today's open.
• STO.AU closed at $8.08 on 21 April — a four-year high and +31.5% YTD. Same dynamic as WDS.AU on the supply disruption concerns.
• KAR.AU and BPT.AU, both small-cap oil-levered names, should track the Brent move at the ASX open.
• NST.AU and EVN.AU face a headwind from the -1.87% gold print, with spot bullion at US$4,738.50/oz into the open.
• Banks CBA.AU, NAB.AU, WBC.AU, ANZ.AU slid on 21 April per Capital Brief coverage. US 10-year yield direction will set the tone at the 22 April open.
• Iron ore majors BHP.AU, RIO.AU, FMG.AU see an SGX print near US$107/t; weaker AUD/USD offsets any lower tonnage price in AUD terms.

Economic calendar today (AEST)

• No scheduled AU macro releases on 22 April 2026 — monthly CPI is due 29 April.
• 23:30 AEST: US EIA weekly crude oil inventories, with Brent around US$94.
• 03:00 (23 April): US Treasury 20-year bond auction result.

What to watch

• US-Iran ceasefire expiry window overnight 22 April AEST. Any confirmation of extension removes the oil bid; any formal lapse extends it.
• S&P/ASX 200 opens from 8,949.4 — the pivot to watch on whether energy strength offsets the overseas risk-off move.
• AU VIX closed 13.17 on 21 April. A reading above 14 into today's close would mark a meaningful break from the recent compression.

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