In the first quarter of 2023, Jane Street achieved a record $16.1 billion in trading revenue, attributed to heightened market volatility and substantial investments in artificial intelligence companies such as Anthropic and CoreWeave. This performance led to a remarkable profit increase, more than doubling to $10.3 billion, and represented a 40% revenue growth compared to the same period last year. The firm's medium-frequency trading strategies, which involve holding positions for extended periods, played a crucial role in this success. Jane Street has rapidly gained market share against competitors like Citadel Securities and Hudson River Trading, leveraging advanced real-time pricing tools developed over 25 years. The recent surge in trading activity was influenced by global events, including concerns over the Iran conflict and oil supply disruptions, which intensified market jitters. As a result, major U.S. banks, including JPMorgan Chase and Citigroup, also reported significant gains in their trading operations during this quarter.