Splits use borrowed money on top of investor funds, giving the potential for high returns. But falling stock markets have taken a disproportionate toll on their value. Many were badly burnt by the bursting of the technology bubble. BFS, with 10 splits, has seen the value of some funds plummet. Its Geared Income fund, which Reid admits is 'an embarrassment', is trading below 1p. 'Obviously, we are very unhappy about what's happened,' he said.