Stock Market: Will S&P 500 Open Up or Down Today?

What happened

U.S. stock futures traded mixed early Wednesday ahead of the Federal Reserve's interest rate decision, earnings from Microsoft and Alphabet, and rising U.S.-Iran conflict costs. Polymarket traders gave a 55% chance of a higher S&P 500 open on October 28.

Confirmed

Global impact / market context

Tech strength supports the S&P 500, while geopolitics and oil threaten it. The Pentagon reports the U.S. war in Iran has cost over $47 billion, which means more borrowed money or reduced cash available, potentially raising costs and government spending pressure on markets.

Analyst inference

Nasdaq 100 futures rose 0.35%, S&P 500 futures 0.04%, while Dow futures fell 0.16% and Russell 2000 slipped 0.14%. Brent crude rose 1.43% to $110.97, which means fuel costs for companies and consumers climb.

Analyst inference

What to watch

1. Watch the Federal Reserve's interest rate decision, which means the cost of borrowed money, along with Microsoft and Alphabet earnings, since these events drive investor positioning across tech and the S&P 500 today. Confirmed
2. Watch whether Polymarket's 55% chance of a higher S&P 500 open holds as tech futures stay positive while energy costs rise, which means early bullish sentiment could fade during the session. Proposed
3. Watch for higher oil and U.S.-Iran conflict costs feeding into company expenses and capital spending plans, which means profit per sale could shrink for energy users and transport firms. Analyst inference

Affected assets

• OP — Optimism

Evidence

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