U.S. stock futures fell on Sunday evening as markets braced for fresh weakness in technology shares after OpenAI said it was halting development of some advanced artificial intelligence models.

Heightened tensions in Iran also weighed after U.S. President Donald Trump rejected a ceasefire proposal, with oil prices up sharply in early Asian trade.

This week’s economic highlights include the release of the personal consumption expenditures price index for August from the Bureau of Economic Analysis on Wednesday and the September jobs report, which the Bureau of Labor Statistics will release Friday.

Economists expect a 3.7% increase in the PCE from a year ago and a 3.3% increase in the core PCE price index, excluding volatile food and energy prices. The consensus among economists is that nonfarm payrolls increased 100,000 in September, while the unemployment rate stayed at 4.1%.

S&P 500 Futures fell 0.28% to 7,774.25 points. Nasdaq 100 Futures fell 0.74% to 30,659.50 points, and Dow Jones Futures fell 0.36% to 51,977 points.

Tech stocks dropped in overnight trading.

Chip stocks fell in overnight trading. Direxion Daily Semiconductors Bull 3x Shares fell 5%; SK hynix, Arm, Intel, and SanDisk fell 3%; Marvell Technology, Seagate, Western Digital, AMD, Qualcomm, and Micron Technology fell 2%; ASML and TSMC fell 1%.

Optical communications stocks fell in overnight trading. Photonics & Optics ETF and AXT Inc fell 4%; Credo Technology and Applied Optoelectronics fell 3%; Coherent, Ciena, Lumentum, Corning, and POET Technologies fell 2%.

Crypto stocks also fell in overnight trading. Circle fell 3%; Bitmine, Robinhood, and Coinbase fell 2%,

Elsewhere among individual stocks, Meta Platforms fell 2.6%; CoreWeave and NEBIUS fell 2%; Oracle fell 1.1%.