<prompt> Human: My situation: early 30s, didnt start investing until last year as I was afraid of moving away from cash savings, and have made a few sizable contributions recently in order to catch up. The last one was literally the day before the market started to tank. Tough pill to swallow.So Im a little spooked - and more than a little depressed - but I feel like historical data suggests that regardless of whether this continues to slide or not, it will go back up eventually...meaning now is a good time to consider DCA investing in the coming months...right? Or am I totally wrong on that? By investing, I mean in my brokerage account that I have split between SP 500 and total market.Im not about to dump any more large chunks in at once, but Im thinking of doing 100-200 maybe every other week for the rest of the year. Is that a really stupid idea? Ill still have an emergency fund thatll hold me at least six months.  <response>: Now is always a great time to invest long term because in 20 years it never matters whats going on right now. Over any 20 year span the return fluctuates very minimally. 