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

January presented another opportunity for thoughtful tilts, as investors navigated the unexpected following an election-year ...

The table below lists the S&P 500's top sectors by weighting as of Jan. 27, 2025. The information technology, financials, health care, and consumer discretionary sectors carry a cumulative weight of ...

An S&P 500 index fund tracks the S&P 500, a market index that measures the performance of about 500 U.S. companies. Index funds, by definition, aim to mirror a particular market index, such as the ...

Shelby Knowles / Bloomberg via Getty Images The S&P 500 declined by 0.5% on Friday, Jan. 31, as investors digested the White House’s proposed tariffs on Canada, China, and Mexico. Deckers ...