Stocks are coming off their worst session since May as tensions between the U.S. and North Korea linger.

In the latest developments between the two countries’ war of words, President Donald Trump on Friday tweeted another stark warning to North Korea.

Military solutions are now fully in place,locked and loaded,should North Korea act unwisely. Hopefully Kim Jong Un will find another path!

The tweet came a day after Trump said his previous warning to North Korea that it would face “fire and fury” may not have been “tough enough.”

“This is a very fluid environment. Typically you would see buyers coming in off a sell-off … you could see some buying on the dips,” Prudential Financial chief market strategist Quincy Krosby.

“We could see some zigging and zagging going into the weekend.”

The CBOE volatility index (VIX), widely considered the best gauge of fear in the market, hit its highest level since the presidential election before easing to 14.89.

Before this week, U.S. stocks have been hitting record highs, boosted by mostly stronger-than-expected earnings. Snap, however, did not beat expectations. The social media company posted bigger-than-expected loss and a smaller-than-expected revenue, sending the stock down more than 10 percent.