Moment, a fintech startup founded by former Citadel Securities quants, has secured $78 million in a funding round led by Index Ventures, with participation from Andreessen Horowitz and Avra. This brings Moment's total funding to over $100 million since its inception in 2022. The company is developing an AI-driven trading platform for banks, brokers, and wealth managers, aiming to automate workflows in fixed income and equities markets. The platform, described by Index Ventures as the first operating system for fixed income, seeks to streamline trading, research, and portfolio management in a market valued at approximately $150 trillion. Moment's recent expansion includes partnerships with major wealth managers like Edward Jones and LPL Financial, highlighting the demand for modernized trading systems. This funding comes amid a broader trend of AI-driven trading infrastructure gaining traction across traditional and crypto markets. Moment's challenge will be to scale its AI-native stack beyond early adopters and potentially influence execution infrastructure in crypto markets.