Hudson River Trading (HRT) is a multi-asset class quantitative trading firm, and more specifically a high-frequency trading (HFT) firm, based in New York City and founded in 2002. The company is a global liquidity provider and market maker, operating in markets across the world, including equities, futures, options, currencies, and fixed income. HRT uses advanced technology and algorithms to analyze market data and execute trades at high speeds, with a focus on providing liquidity to the markets and minimizing risk. The company is known for its innovative approach to trading and its use of cutting-edge technology, including machine learning and artificial intelligence.