An epic battle is raging between hedge funds and retail investors for the shares of Gamestop, an American computer games and hardware retailer.

While the professionals in the chain of stores do not predict any future and speculate on a decline, the small investors see it very differently.

On Tuesday, the Gamestop share was the most widely traded security on the market.

For some it means big profits, for others big losses.

“The mass of retail investors obviously have the power to make any stock in the world the most traded on any given day,” says Jim Reid, strategist at Deutsche Bank. He wonders if Gamestop is a one-off curiosity or a lingering phenomenon that is shaking up entire markets. These companies are now the focus.