You hear it on the evening news: the market hit a new high. Then you open your statement and wonder why it doesn't feel that way. Both can be true at the same time. Here's why.
The headline number is weighted toward the biggest companies
The S&P 500 is the number most people mean by "the market." It weights each company by its size, so a handful of the very largest companies can move the whole index. When those few do well and most others don't, the index can climb even while the typical stock goes down.
That's exactly what happened in parts of 2026. The S&P 500 set new records, while smaller companies, and even the average company in the index, lost ground.
Why a diversified portfolio won't match it
A portfolio built to fit your goals usually holds a mix: large and mid-size companies, some small companies, some international stocks, and often bonds. That's on purpose. It spreads your risk so you aren't depending on a few companies at the top of the index. The trade-off is that in a narrow market, your results won't move in lockstep with the headline.
The reverse happens too. When the market broadens out, the parts of a portfolio that lagged can be the ones that lead.
What to watch instead
- Your plan. Are you on track for what you need your money to do?
- Your mix. Has a strong run pushed any part of your portfolio past its target? That's a signal to rebalance, not to chase.
- Your timeline. Money you'll need soon should be invested differently from money you won't touch for 15 years.
The bottom line
The headline number is a useful snapshot, but it isn't a scorecard for your own plan. If you've ever looked at the news and then at your statement and felt confused, that's a great question to bring to a conversation.
For information only; not a recommendation to buy or sell any security. Indexes are unmanaged and can't be invested in directly. Diversification does not guarantee a profit or protect against loss.