They say you have to speculate to accumulate, but things don't always work out that smoothly.
According to the European Football Index, however, Sheffield United are doing pretty well.
After spending over £120 million on players, Chris Wilder has increased the value of his Blades squad significantly during his time in charge.
Click and scroll through to see the full set of figures, and how he compares to his Premier League rivals:
After spending over £120 million on players, Chris Wilder has increased the value of his Blades squad significantly during his time in charge.
9. Slaven Bilic - West Brom
Starting Squad Value: £81,833,000 Current Squad Value: £78,530,000 Players Signed: £29,980,000 Players Sold: £31,380,000 Effective Profit: -£1,903,000 (Photo by Catherine Ivill/Getty Images) Photo: Catherine Ivill
10. Frank Lampard - Chelsea
Starting Squad Value: £760,545,000 Current Squad Value: £749,320,000 Players Signed: £222,480,000 Players Sold: £191,310,000 Effective Profit: -£42,395,000 (Photo by Lee Smith - Pool/Getty Images) Photo: Pool
11. Ralph Hasenhuttl - Southampton
Starting Squad Value: £219,690,000 Current Squad Value: £195,570,000 Players Signed: £69,030,000 Players Sold: £48,240,000 Effective Profit: -£44,910,000 (Photo by Andrew Boyers / POOL / AFP) Photo: ANDREW BOYERS
12. Carlo Ancelotti - Everton
Starting Squad Value: £428,130,000 Current Squad Value: £424,670,000 Players Signed: £67,400,000 Players Sold: £3,980,000 Effective Profit: -£66,880,000 (Photo by John Sibley - Pool/Getty Images) Photo: Pool