(Reuters) -Citadel Securities' revenue from trading and market-making slid 8.4% in the second quarter as volatility ebbed, according a source familiar with the company's results.

But tariff-driven swings across financial markets in the first quarter still helped the market maker generate a record $5.77 billion in revenue in the first half, said the source, who declined to be identified because the the details are private. That puts Citadel Securities on track to beat its annual revenue record of $9.7 billion in 2024.

Citadel Securities makes markets in stocks, ETFs, mutual funds and other assets globally on behalf of institutional investors, deploying its own balance sheet to help enhance liquidity. The firm, founded by hedge fund billionaire Ken Griffin, is based in Miami.