First Trust Advisors LP cut its stake in shares of iShares National Muni Bond ETF (NYSEARCA:MUB – Get Rating) by 24.3% during the 4th quarter, Holdings Channel.com reports. The fund owned 6,483 shares of the exchange traded fund’s stock after selling 2,077 shares during the period. First Trust Advisors LP’s holdings in iShares National Muni […]