Top stockpicker stops withdrawals after dismal performance sees fund shrink rapidly. : Superstar fund manager Neil Woodford has stopped investors withdrawing money from his main fund after a series of bad bets prompted clients to rush for the door. Britain’s most high-profile stockpicker, Mr Woodford has seen his main fund shrink from £10.2bn to £3.7bn after a long run of poor performance. The fund shrunk by £600m in just the last month, including £187m withdrawn by customers with the rest made up by the tumbling value of its investments.