Wall Street's third straight loss; 30-year yields at 19-year high — ASX into a cautious open

Sentiment: mixed Overnight US: S&P 500 -0.67% · 30-yr Treasury 5.19%

Overnight Wall Street

The S&P 500 closed at 7,353.61 on 19 May 2026, down 49.44 points or 0.67%, the third straight losing session. The NASDAQ Composite dropped 220.03 points (0.84%) to 25,870.71. The Dow fell 322.24 points (0.65%) to 49,363.88. The VIX edged up 1.35% to 18.06.

The 30-year Treasury yield briefly topped 5.19% — its highest level in nearly 19 years. The 10-year yield touched 4.687%, the highest since January 2025. Long-end yields, not earnings, drove the session.

• CSCO.US -3.04%, BA.US -2.62%, MMM.US -2.08% — industrials and old-tech took the brunt
• VZ.US +2.18%, AMGN.US +1.97%, MRK.US +1.52% — defensive yield-proxy buying
• MU.US +4% and SNDK.US +2.7% — memory-chip names got a bid after three sessions of losses

Commodities & FX (AU-relevant)

• Gold: US$4,484/oz, -0.60%
• Brent: US$111.14, -0.13% (intraday low near US$110.69 after Iran-strike postponement)
• WTI: US$104.20, +0.05%
• Iron ore 62% Fe SGX (Jun '26): US$111.50/t, -0.45% over 24h
• Copper: US$6.20/lb, -0.10%
• AUD/USD: 0.7109, -0.88%

Trump postponed the planned strike on Iran at the request of Qatar, Saudi Arabia and the UAE. Brent fell more than 1% intraday before steadying near US$111. Crude remains +54% since the Iran war began on 28 February. The AUD's slide to 0.7109 is the steepest single-session move since the 5 May RBA hike — a translation tailwind for USD-revenue earners CSL.AU, RMD.AU, JHX.AU, and a translation drag for USD-cost retailers and airlines.

Key themes for ASX open

• Long-end yields set the tone. A 30-year Treasury at 5.19% adds a discount-rate drag for long-duration parts of the ASX — REITs SCG.AU, GMG.AU and tech XRO.AU, WTC.AU are the most sensitive.
• Iron ore softness vs. yesterday's miner support. SGX iron ore is back near US$111/t after the May rally. BHP.AU closed yesterday at $58.26 (-0.86%); the materials sector is down 7.5% from its recent high over four sessions.
• Banks face a yield test. CBA.AU closed at $162.67 yesterday (+1.12%) after a bank-sector rebound. The 11:30 RBA minutes will set the second-half tone.
• Energy holds the war-level, not the war-trend. Brent at US$111 keeps the premium but no longer extends it. WDS.AU and STO.AU trade off the spot, not the strike-cancellation headline.

Economic calendar today (AEST)

• 11:30 — RBA Monetary Policy Board minutes from the 5 May meeting (which hiked 25bp to 4.35% — the third hike of 2026; vote 8-1)
• Tonight (early Thursday AEST) — Nvidia Q1 FY27 earnings after the US close on Wednesday
• US Treasury 20-year auction tonight US time — primary bond-demand read after Tuesday's 30-year yield spike

What to watch

• The RBA minutes for the Board's tone on whether further hikes remain in play, with Governor Bullock having said the earlier hikes were dealing with pre-conflict inflation
• Iron ore complex holding the US$110/t handle as materials enter a possible fifth session of pressure
• Nvidia's Q1 FY27 print for the read into Australian semis on Thursday — NXT.AU for data-centre demand and GMG.AU for AI-infra warehouse demand

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