US week in review — Saturday, September 26, 2026

S&P 500 gains 1.21% for the week as chipmakers rally and the 10-year yield reaches 5.18%

The S&P 500 rose 1.21% to 7,743.41 in the week to 25 September 2026 and the Nasdaq 2.06%, as Meta's Muse AI agent lifted chipmakers: INTC.US +13.26%, AMD.US +12.65%, ARM.US +12.59%. The 10-year Treasury yield rose 19 bps to 5.184% after a 58.4 flash composite PMI, and the Russell 2000 fell 0.80%. GRAL.US gained 57.10% after an FDA panel backed its Galleri test. August PCE lands on 30 September and September payrolls on 2 October.