Fidelity announced yesterday that it's launching the Fidelity ZERO Total Market Index Fund (FZROX) and Fidelity ZERO International Index Fund (FZILX). The catch? No fees at all - 0% expense ratios, $0 account maintenance fees and $0 minimums.Technically, these are mutual funds, not ETFs, but we've got an official winner in the race to 0% expense ratios. I don't expect the likes of Vanguard or Schwab to immediately retaliate with their own 0% offerings, but I imagine the timeline has just been sped up.