Kenneth_2003 said:

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My take...
While on the macro and long term scale the markets are very (even completely) efficient, on the shorter scales they are jittery and prone to panic. It's unpleasant, but it's ok if you're accustomed to it. The market wants to know that they've seen everything coming and have the future completely priced in. This is important to remember. The market doesn't move on good news. Good news should have already been priced in because the market saw it coming. They move on the promise or expectation of continued good news.

Unforeseen developments that catch the markets by surprise lead to that jittery panic and induce selloffs. They sting and they're unpleasant but generally speaking these are events to buy into.

Pullbacks are a good thing. They ultimately free up the capital needed to rebalance the market as a whole.

Edit to add... Unless you have a specific reason to be bearish, then you should be bullish.

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I check my retirement pretty regularly but I have it locked up and I don't make any changes when the market freaks out.

My buddy was freaking out because he lost money and started moving stuff around in his retirement. I had lost a decent chunk out of my retirement when the market fell out recently but now I am even higher. For me checking regularly makes me see the fluctuations and not freak out