The stock market is anything but normal right now — and these charts show it

The S&P 500 is trading just shy of record territory, yet most individual stocks are struggling. That gap between the index and the average constituent is the story worth understanding. Indexes are weighted by market value, so the largest companies can lift the headline number even when the majority of stocks are flat or falling. When participation is narrow, the index can look healthy while the typical stock is not.

This matters because breadth — how many stocks are rising versus falling — is often treated as a gauge of underlying market health. A rally carried by a handful of mega-caps can persist, but it is more fragile than one shared across many sectors and sizes.

What to watch: whether participation broadens or narrows further, and whether leadership rotates beyond the largest names. Breadth measures are descriptive, not predictive, so they are best read alongside earnings trends and valuations rather than as standalone signals.