The S&P 500 has had a volatile start to 2025 but has still managed to gain 3.8% year to date as of market close on Jan. 24.

The NASDAQ-100 is widely followed as a measure mainly of the big tech and social media stocks that make up the index.

The S&P 500 fell 0.5% on Wednesday, Jan. 29, as the Federal Reserve held interest rates steady in a move widely expected by ...