Windham Capital Management LLC boosted its holdings in shares of Vanguard S&P 500 ETF (NYSEARCA:VOO – Free Report) by 0.8% in the fourth quarter, HoldingsChannel reports. The firm owned 8,760 shares of the company’s stock after acquiring an additional 69 shares during the period. Vanguard S&P 500 ETF makes up 1.4% of Windham Capital Management […]