The stock market is crashing: Here’s what financial experts say you should do now

Markets are in free fall in response to President Donald Trump's far-reaching tariffs, with all major U.S. indices in the red and expected to close in bear territory. After a long bull run, that can be scary for young investors who aren't accustomed to such turmoil. But experts say the best course of action for those with decades ahead of them until retirement is to take a breathe, change the channel from markets news, and leave their 401(k) alone.

The advice may seem simplistic in...