...Hudson River Trading LLC (HRT) has a profitable principal trading and market-making franchise, focused on expanding its trading strategies across asset classes and regions. However, its business relies on higher-risk and less stable principal trading revenue that depends on market volume and volatility. Despite significant growth compared with some peers and weaker-than-peers' performance in 2022, HRT's capitalization remains solid. HRT's RAC ratio was sound at 11.3% as of March 31, 2023, indicating its ability and willingness to retain earnings and build equity capital. We expect continued growth in trading operations to increase exposures, but we anticipate the RAC ratio will remain 9.5%-10.5% over the next 12 months. We view funding as a relative weakness, given the firm's reliance on short-term funding. Although HRT has boosted its stable funding through retained earnings and upsizes of its term loans, this has not kept pace with the growth in its on-balance-sheet trading book, leaving...