Billionaire Bill Ackman's hedge fund delivered 58% returns in 2019 after making a big investment in Warren Buffett's Berkshire Hathaway

7:36am PST - January 7th, 2020    yahoo finance - Business Insider

Pershing Square Holdings, the activist hedge fund run by billionaire Bill Ackman, returned 58.1% in 2019, the fund said in December. It's the first net positive annual performance for Ackman's fund in three years. Ackman increased his position in Warren Buffe…