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.

Vanguard, the world’s second-largest ETF issuer, recently announced its largest fee cuts in its 50-year history. The company has reduced fees

As one of the world’s largest asset managers, Vanguard’s move will pass on significant savings to investors while also putting significant margin pressure on ETF competitors. However, the implications for the ETF industry will vary by ETF category.

Vanguard Group Inc.’s biggest salvo yet in its campaign to cut fees for the investing masses presents industry rivals with a painful choice. Follow suit and lose potentially hundreds of millions in revenue — or hold the line and risk losing badly needed market share.

The world’s second-largest asset manager has slashed the cost of fund investing, in a record move that is expected to save investors more than $350 million this year alone.

Vanguard made headlines by touting what it called “our largest-ever reduction in expense ratios.” The asset manager known for rock-bottom costs, said it was reducin