Marex Group plc (MRX) shares plummeted 6.39% in pre-market trading on Tuesday, a sharp reversal from earlier gains following the company's strong fourth-quarter results.

The decline comes amid a broad sell-off in financial stocks. The Financial Select Sector SPDR ETF (XLF) was down 1.8% pre-bell, with leveraged financial ETFs showing even steeper moves. Specific financial names like Apollo Global Management and Bank of America were also trading lower, indicating sector-wide pressure that overwhelmed Marex's positive company-specific news.

Earlier, Marex had reported Q4 adjusted earnings of $1.13 per share, beating analyst estimates, and revenue of $572.1 million, also above expectations. The initial market reaction to these results was positive, with the stock trading higher in the early pre-market session. However, the prevailing negative sentiment across the financial sector appears to have dragged Marex's shares down significantly by the late pre-market period.