Live feed16:15:52·1481dINSIDERFilingvia QuantisnowSEC Form 4: Biser Sheri D converted options into 4,141 shares and returned 25,015 shares to the company, closing all direct ownership in the companyByQuantisnow·Wall Street's wire, on your screen.GFED· Guaranty Federal Bancshares Inc.FinanceOriginal source