A Wall Street giant is chopping prices on something that may be part of your retirement savings. BlackRock is reducing fees for some of its low-cost exchange traded funds, or ETFs. Lower-fee products, like BlackRock’s iShares, are expected to get much more popular as a new government rule kicks in requiring brokers to put their clients’ interests ahead of their own.

Click the above audio player to hear how this new rule could impact what you pay to save for retirement.