Stock futures rose Friday, as the major averages tried to post their fourth straight day of gains.

Futures on the Dow Jones Industrial Average gained more than 100 points. S&P 500 futures and Nasdaq 100 futures climbed about 0.5% each.

Tech strength continued after hours as shares of social media companies Twitter and Snap each jumped following better-than-expected second-quarter earnings reports. Twitter traded more than 5% higher in the premarket, while Snap shot up 16.4%.

The major U.S. indexes closed Thursday’s regular trading session higher to notch a three-day win streak. The Dow rose 25.35 points, or 0.07%. The S&P 500 climbed 0.2% higher. The tech-heavy Nasdaq Composite led the markets with a 0.36% gain.

All three U.S. stock averages are on pace to close the week in the green for a fourth positive week in five, rebounding from last week’s losses and Monday’s sharp sell-off.

Microsoft had the most positive impact on the S&P 500 and the Nasdaq on Thursday; the stock closed 1.7% higher. Salesforce had the greatest positive impact on the Dow as the software stock gained 2.6% on Thursday.

The strength in tech shares comes as the continued spread of the highly contagious delta Covid variant raises concerns about economic growth.

“We saw during the depths of the pandemic that tech stocks and their earnings held up the best, so I think a lot of investors are going back to the well, given we have a Covid resurgence,” Yung-Yu Ma, chief investment strategist at BMO Wealth Management, said. “Long term interest rates coming down as much as they have also makes those stocks more attractive.”

Major technology companies including Microsoft, Google-parent Alphabet, Apple, Facebook and Amazon are set to report second-quarter earnings next week.