U.S. bank shares plummet

(Reuters) - Shares of U.S. banks fell on Thursday. Highlights:

* Citigroup Inc (C.N) shares fall as much as 25.5 percent to $4.77

* Bank of America Corp (BAC.N) shares fall as much as 10.6 percent to $11.68

* JPMorgan Chase & Co (JPM.N) shares fall as much as 18.5 percent to $23.21

* S&P financials index .GSPF falls as much as 8.5 percent

* Goldman Sachs Group Inc (GS.N) shares fall as much as 11.1 percent to $49.00

* Morgan Stanley (MS.N) shares fall as much as 12.2 percent to $9.00