Investors have upped their interest in actively managed bond ETFs, pouring record capital into them in January as some paid up in hopes of stronger returns.

Vanguard Group (VOO), one of the world's largest ETF issuers, announced it is reducing fees on 168 mutual funds and ETF-related share classes, potentially saving investors over $350 million this year.

Malvern-based Vanguard is pricing active funds cheaper as it competes with Schwab, Fidelity, and other mass-market money managers.