As first pointed out here last week, IG9 10Y credit risk has pushed nothing but wider since the JPM news broke. Between the size, common-knowledge, and technical richness of the position, liquidity is providing its helping hand as the legacy credit index is now 25bps worse than last week's lows (and 17bps worse than when JPM announced) - while the on-the-run IG18 is only 10bps wider over this period. Extrapolating the $200mm DV01 we assumed from the initial announced loss and spread movement, this is potentially an additional $3.4bn loss for JPM already (who we can only assume have been trying to unwind). Until the skew (the spread between the index and its components) narrows further - which it is today (though momentum will take over at some point in the index itself) - it is likely that the runaway train will keep going and going, until JPM issues a formal announcement [4] that the firm is fully out of the trade, together with a final tally of its losses, which will probably be double the reported loss as of Thursday.
[5]
Here is the good news: we are 100.4% certain JPM was the ONLY prop trading bank to be massively, massively short IG9-18 into this epic blow out. Because if other had suffered billion dollar losses, they would all pull a Jamie Dimon and fess up. Right?