The S&P 500 has risen more than 17% so far in 2025, driven by megacap tech companies for much of the year, but the rally has broadened of late, with investors piling into cyclical sectors such as financials and materials. Traders are waiting to see if the "Santa Claus rally" — a seasonal phenomenon where the S&P 500 posts gains in the last five trading days of the year and the first two in January, according to Stock Trader's Almanac — can happen this time.
US STOCKS-Wall St set for flat open in post-Christmas session
