Tech is the best performing sector this year, as well as over the past decade. Investors continue to pour money into popular technology stocks despite economic uncertainty and health crisis. While valuation look stretched in some cases, investors believe in their growth potential.Biggest tech giants—Apple (AAPL), Microsoft (MSFT), Amazon (AMZN) and Facebook (FB)—are trading close to their all-time highs, and their combined market value is about $5 trillion.Apple, Amazon, Alphabet (GOOGL) and Microsoft, spent about $29 billion on R&D last quarter, up 17% year-over-year, per WSJ, more than NASA’s annual budget.These stocks also got a boost from the coronavirus. “We’ve seen two years’ worth of digital transformation in two months,” per Satya Nadella, CEO of Microsoft. Some of these trends will continue even after the crisis is over.To learn more about the Vanguard Information Technology ETF (VGT), the iShares U.S. Technology ETF (IYW) and the Invesco QQQ ETF (QQQ), please watch the short video above.Want key ETF info delivered straight to your inbox?Zacks’ free Fund Newsletter will brief you on top news and analysis, as well as top-performing ETFs, each week. Get it free >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Microsoft Corporation (MSFT): Free Stock Analysis Report Amazon.com, Inc. (AMZN): Free Stock Analysis Report Apple Inc. (AAPL): Free Stock Analysis Report Invesco QQQ (QQQ): ETF Research Reports Facebook, Inc. (FB): Free Stock Analysis Report Alphabet Inc. (GOOGL): Free Stock Analysis Report Vanguard Information Technology ETF (VGT): ETF Research Reports iShares U.S. Technology ETF (IYW): ETF Research Reports To read this article on Zacks.com click here. Zacks Investment Research Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report