It's hard to believe now, but the 2019 ETF rule is more than six years old. The SEC's decision to streamline ETF product development has enabled the launch of countless new ETFs, bringing the wrapper to untold new heights as an investment vehicle. Active ETFs have been a key beneficiary, and in the years since the rule, have played a bigger and bigger part in the historically mutual fund-dominated bond space. One ETF which recently celebrated its own fifth birthday helps capture the investment case for usin ...