American Investment Services Inc. grew its stake in shares of Vanguard Mega Cap ETF (NYSEARCA:MGC – Free Report) by 0.4% in the fourth quarter, HoldingsChannel.com reports. The firm owned 76,617 shares of the company’s stock after purchasing an additional 302 shares during the period. Vanguard Mega Cap ETF comprises about 2.4% of American Investment Services […]