Since last Friday, shares of the popular online brokerage Robinhood ( HOOD 2.25%) had surged 13%, as of 12:36 p.m. ET Thursday. Investors believe the company will soon join the S&P 500 ( ^GSPC 0.04%).

Wall Street on Friday was on track to post its best monthly advance since November 2023, though sentiment was subdued.

Shares of Citigroup (NYSE: C) have outperformed at the start of 2025, returning a solid 4% year to date as of this writing, ...