Fidelity announces two additional zero-expense ratio funds

by Stahrk

https://www.bloomberg.com/news/articles/2018-09-12/fidelity-launches-two-additional-zero-fee-index-mutual-funds

https://www.fidelity.com/about-fidelity/individual-investing/fidelity-continues-to-lead-the-industry-with-launch

With the addition of these funds, this makes a total of four zero-ER offerings from Fidelity, they’ve lowered the ERs on most of their other funds, and also nixed the minimum investment requirements and all account-level fees.

This appears to be a rather significant threat to Vanguard, as their online interface, trading, and advisory services have always lagged, but they led on cost, which is no longer the case. What are everyone’s thoughts?