Financial executive Alan J. Levan defrauded investors at the verge of the Florida housing collapse in 2007 as head of Fort Lauderdale’s BankAtlantic Bancorp, a federal jury found Monday.

The trial centered on statements made by Levan and regulatory filings made by BankAtlantic as its shares plummeted 35 percent after the bank posted a loss on rising nonperforming loans. Its stock price fell from $46 to $16 in a nine-month span.