I mean I am planning to still be adding to my investments and not selling any of it for more than 20 years. If you are caring about the short term returns then you wouldn't or shouldn't be invested so heavily in stocks, you should be shifting to more stable investments as you approach retirement or the time in which you plan to start selling some of your investments.

Not only does a pull back not really matter in the long term, but it even provides an opportunity to buy more at a lower cost now too!