Selling Citigroup: A Simulation of the U.S. Treasury’s $37 Billion TARP Share Sale

On April 26, 2010, the U.S. Treasury had 163 trading days to sell a $37 billion dollar stake of 7.7 billion shares in Citigroup. Citigroup’s stock price on April 23, 2010, was well above the U.S. Treasury’s “break even” price of $3.25. The U.S. Treasury announced that it planned an at-the-market sale over about six months. This paper uses Monte Carlo simulations to argue that the U.S. Treasury bore a 17 percent chance of not completing the sale if it refused to sell its shares at a loss and sold no more than 50 million shares per day. The author argues the government could have had less downside and idiosyncratic risk by selling a significant fraction of its holdings in an underwritten offering early in the selling period.