Amazon’s and Intel’s stocks are set to plunge. But Wall Street’s October winners may surprise you.

October delivered a split verdict for U.S. equities. Technology stocks bore the brunt of the selling, with Amazon and Intel among the names facing sharp declines, while other corners of the market held up better than the sector-wide gloom might suggest. The divergence is a reminder that the S&P 500 is not a single story: weakness in a handful of large technology names can weigh heavily on headline index performance while broader participation quietly improves elsewhere.

For readers, the key takeaway is composition. Market-cap-weighted benchmarks give outsized influence to the largest companies, so a tech pullback can obscure gains in sectors such as financials, industrials or defensives. Watching equal-weight indices, sector breadth and advance-decline lines can help distinguish a narrow tech correction from a genuinely broad risk-off move.

What to watch next: whether technology weakness stays contained or spreads into earnings guidance and capital spending plans, and whether leadership outside tech persists. Those signals matter more for the market's direction than any single stock's monthly move.