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JPMorgan Trader Iksil Fuels Prop-Trading Debate With Bets

JPMorgan Chase & Co. trader Bruno Iksil’s outsized bets in credit derivatives are drawing attention to a little-known division that invests the company’s reserves and fueling a debate over whether banks are taking excessive risks with federally insured and subsidized money.

Iksil’s influence in the market has spurred some counterparts to dub him Voldemort, after the Harry Potter villain. He works in London in the bank’s chief investment office, which has assembled traders from across Wall Street to its staff of 400 who help oversee $350 billion in investments. While the firm describes the unit’s main task as hedging risks and investing excess cash, four hedge-fund managers and dealers say the trades are big enough to move indexes and resemble proprietary bets, or wagers made with the bank’s own money.