What happened 

Shares of Zoom Video Communications (NASDAQ:ZM) were rising today as COVID-19 cases in the U.S. and Europe continue to climb. As fears that cases of the disease will increase during the fall and winter, investors have again focused their attention on tech stocks that they believe will be in demand during the pandemic. 

Zoom's stock was up by as much as 5.3% today but had gained 3.2% as of 2:15 p.m. EDT. 

So what 

Technology stocks have been in demand since the pandemic reached the U.S., and investors appear to be continuing that trend with Zoom's share-price bump today. As lockdowns and social distancing have gripped the U.S., Zoom's stock has skyrocketed, rising 750% since the beginning of this year.

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Image source: Getty Images.

Medical experts in the U.S. have warned that there could be a surge of COVID-19 cases in the fall and winter, and last week 10 states reported their highest single-day case counts. Additionally, 27 states are seeing their case counts climb. And as cases have increased in Europe, local governments in Paris and London recently increased social restrictions in their cities. 

It appears that investors are expecting that the increase in cases will lead to even more social distancing, which could boost usage of Zoom's video calls. 

Now what

While Zoom's stock has been on a tear this year, investors should keep in mind that there's still a lot of uncertainty surrounding the U.S. economy, the presidential election, and the pandemic. All of those things could cause unexpected volatility in the stock market in the coming months.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.