Despite the "Magnificent Seven" — or three — powering the S&P 500, the long list of companies hitting new record highs shows another side of the market concentration conversation.
This week saw the stock market's biggest one-day drop — and bounce back. But has anything changed?
A few large tech stocks have been driving the S&P 500, but strategists see a path for further gains even if the market's darlings stop outperforming.