Taking to Twitter on March 17, investor and renowned short-seller Bill Ackman said Bank of America has plans to step in and acquire distressed U.S. Signature Bank, one of three banks that went into forced receivership after a crisis in the U.S. banking sector last week.

Previously, Ackman said the US government should “guarantee” all deposits held by SVB to prevent the potential run on other banks and contagion to the broader financial institutions, which has already happened with the case of Credit Suisse and First Republic, two other banks now under distress.

In addition, Ackman warned of a potential “withdrawal of substantially all uninsured deposits” from all banks, not just the systemically important banks, if SVB’s deposits are not guaranteed, explaining that the world would then realize that uninsured deposits are “an unsecured illiquid claim on a failed bank.”