By | May 11 2012 4:58 PM

Fitch Ratings on Friday downgraded JPMorgan Chase & Co. (NYSE: JPM), which just revealed at least $2 billion in losses on questionable trading. The downgrade came the same day a U.S. senator called for a Congressional probe of the giant bank and the head of the Securities and Exchange Commission confirmed that her agents are eyeing the big institution's hedging activity.