If you’d invested in: Man Group and Provident Financial

Investment firm Man Group (LSE: MAN) is the world's largest publicly traded hedge-fund company with more than $100bn in funds under management and more than 1,000 employees around the world.

Be glad you didn't

And a series of setbacks, including investigations by the regulator and two profit warnings in the space of three months, led to its expulsion from the FTSE 100 in 2017. The last year has seen almost 70% wiped off its value.