Credit Suisse shares tank

GENEVA, March 15 (Xinhua) -- Shares of embattled global investment bank Credit Suisse fell by more than 20 percent to a record low on Wednesday.

Since Tuesday, the Swiss-listed bank's shares have fallen continuously.

On Wednesday, Credit Suisse shares opened at 2.28 Swiss francs (2.46 U.S. dollars) per share, fell to 1.55 Swiss francs per share in intraday session and closed at an all-time low of 1.70 Swi