London's multi-manager world experienced significant turmoil as a once-lucrative European rates trade soured. For three years, traders profited by leveraging French government bonds (OATs) in the repo market to capture yield differences. However, rising French yields due to political instability caused OATs to sell off, leading to substantial losses for highly leveraged positions. Reports indicate nearly 100 European rates portfolio managers and traders have lost their jobs as these crowded trades unwound. This situation mirrors a similar blow-up in March, highlighting the risks of concentrated strategies. The mechanics involved buying French bonds, using them as collateral for repo financing, and pocketing the spread, a strategy that became unsustainable. Asset-swap trades, exploiting the spread between French yields and interest-rate swaps, also proved disastrous when French budget concerns surfaced. Hedge funds, acting as liquidity providers, found themselves on the wrong side of rapid market moves, exacerbated by triggered stop-loss levels. The French repo market, heavily reliant on OATs, faces potential funding cost increases if ratings are further downgraded. While some analysts believed the OAT selloff had overshot fundamentals, market events, including widespread protests, continued to widen spreads. Banks are wary of French financials due to the ongoing sovereign debt concerns, and the European Central Bank is unlikely to intervene to rescue these trades. The ejected traders now face an uncertain job market within the financial sector.