Tiger Woods's sponsors have reportedly lost up to $12bn (£7.5bn).
According to E! News, economics professors at the University of California have examined stock market returns for Woods's sponsors in the days following his car crash.
The study took in 13 trading days and finished a week after Woods announced that he will take an "indefinite" break from golf.
The professors found that Gatorade, EA Sports and Nike, which has publicly expressed its support for the sportsman, were some of the worst-hit companies, losing a total of $6bn (£3.7bn).
However, Accenture, which decided to end its relationship with Woods, did not appear to suffer.
Tiger Woods has reportedly entered rehab.
The troubled golfer - who is alleged to have cheated on his wife with around 10 different women - has entered a private facility in Arizona for a reported addiction to sex.
"He has been there for a few days since his handlers forced him to enter the programme,” a source said told X17. "They feel that if he blames his cheating on addiction, the public will forgive him.
"Tiger wants to get back on top. He agreed to put golfing on hold so he could show the world how badly he feels about what he’s done and to prove that he wants to correct the problems that led to his infidelity."

