Wall Street Roundup: Flash crash culprits. Hedge fund top dog.

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Wall Street wins. Although it didn’t garner great reviews, and didn’t have much competition, Oliver Stone’s new film about Wall Street came out on top in the box-office wars in its first week in theaters.

Madoff associate dies. Bernard Madoff’s close Los Angeles associate, Stanley Chais, died Sunday in Manhattan while still under investigation.

Benefiting from regulation. One report out Monday morning says that big private equity firms such as Blackstone will benefit from the financial reform bill, while another commentator predicts that it will be hedge funds that will be the big winners.

Flash crash culprits. Ahead of a government report about the May 6 ‘flash crash,’ a private firm has done research suggesting that a few trading firms may be to blame.

Goldman’s headquarters trouble. The company that owns Goldman Sachs’ London headquarters appears to be defaulting on the property, leading to a seizure of the property by German banks.

Hedge fund top dog. New York magazine looks at the unlikely man who took the top spot among hedge fund earners last year, David Tepper.

-- Nathaniel Popper in New York