WHEATON, Ill.--(BUSINESS WIRE)--First Trust Advisors L.P. ("First Trust†) a leading exchange- traded fund ("ETF†) provider and asset manager, announced today that it has launched the FT Vest U.S. Equity Dual Directional Buffer ETF – August (Cboe: DLAG) (the "fund†). DLAG seeks to provide returns (before fees and expenses) that either match the price return of the SPDR S&P 500 ETF Trust ("SPY†or the "Underlying ETF†) up to a predetermined upside cap or match the absolute value of the negativ. ...