That was likely around the time Mr trump said he was gonna tariff the **** outta Taiwan, that shook the whole mkt, cuz of the wide reaching effects.
Depends what your 401 holds for investments, whether it's actively managed, or maybe it's rules governs that it take a hit when the market tanks.
That was the intent of this thread from the first post, to get you to look at what your investments are, steada bitching when it doesn't do what you thought it would do . . . 10 ? yrs ago .
But you can bet the fund manager got his $$$$$$$$$$