WASHINGTON TRUST Co grew its holdings in shares of iShares National Muni Bond ETF (NYSEARCA:MUB – Free Report) by 24,627.8% during the fourth quarter, HoldingsChannel.com reports. The firm owned 4,451 shares of the exchange traded fund’s stock after acquiring an additional 4,433 shares during the quarter. WASHINGTON TRUST Co’s holdings in iShares National Muni Bond […]