The S&P 500 Is Up 14%. Why Are 4 in 10 Stocks Down?

The S&P 500 is near record highs, yet more than 40% of its members have fallen in 2026. Today's Clear Markets explains why a market-cap-weighted index can rise while the typical stock lags, and what this week's bank earnings, U.S. inflation data and TSMC results may reveal about the durability of the rally. We also examine oil above $106, the high cost of borrowing, and the difference between strong AI demand and the price investors pay for it.

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Key Takeaways
• The S&P 500 is up about 14% in 2026, but over 200 current members are down; the median stock is up only about 4% (Reuters/LSEG analysis).
• Monday: Dow +0.38% to 51,850.55; S&P 500 -0.06% to 7,807.24; Nasdaq -0.44% to 27,245.90, even as roughly 64% of S&P members advanced.
• Technology accounts for more than 10 percentage points of the index’s year-to-date gain, highlighting market concentration.
• Brent crude settled at $106.65 per barrel, up 1.8%, creating different effects for energy producers and fuel-dependent businesses.
• Bank earnings, September CPI and PPI, retail sales and TSMC profit guidance will test whether earnings growth is broadening.
• The U.S. bond market was closed October 12; the roughly 5.24% ten-year Treasury yield cited is from late Friday, not a Monday closing quote.
• A strong business can still be an expensive stock: compare actual earnings and cash flow with the expectations embedded in valuations.