Economy Investor Ackman tweets to Trump: Close down the country Updated : March 19, 2020 07:18 AM IST Ackman runs the $6.5 billion investment firm Pershing Square Capital Management from New York. Ackman told investors last week that he had put on a hedge, steps that helped returns swing to gains in early March from losses in late February. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.