U.S. stock benchmarks closed mostly lower Wednesday, but large-capitalization companies saw powerful gains, after the Federal Reserve projected no interest-rate increases through 2022 and pledged to use its full array of tools to help the economy and financial markets contend with the COVID-19 pandemic. The Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA +1.51% finished off 282 points, or 1%, at around 26,990, while the S&P 500 index closed down 0.5% lower at about 3,190. Meanwhile, the Nasdaq Composite Index /zigman2/quotes/210598365/realtime COMP +1.87% closed up 0.7% at around 10,020, while an index of the largest 100 companies in the Nasdaq, the Nasdaq-100 /zigman2/quotes/210598364/realtime NDX +1.91% , ended up 1.3% at 10,094. The finish for the Nasdaq Composite was its first above 10,000 in history. Both Nasdaq gauges closed at record heights. Those technology-laden benchmarks have been propelled higher by gains in Tesla Inc. /zigman2/quotes/203558040/composite TSLA +3.40% , Microsoft Corp. /zigman2/quotes/207732364/composite MSFT +0.78% , Apple Inc. /zigman2/quotes/202934861/composite AAPL +2.39% , as well as chipmaker Nvidia Corp. /zigman2/quotes/200467500/composite NVDA +1.25% , which helped to boost exchange-traded funds, the iShares PHLX Semiconductor ETF /zigman2/quotes/209255350/composite SOXX +2.75% and the VanEck Vectors Semiconductor ETF. Meanwhile, shares of Hertz Global Holdings Inc. /zigman2/quotes/200655672/composite HTZ +0.83% , closed down nearly 40%, after the bankrupt car-rental company revealed that it received a delisting notice from the New York Stock Exchange. The company's shares have been one of the beneficiaries of optimism surrounding reopenings from COVID-19 lockdowns, but its surge higher also has underscored the exuberance in equities despite an economy that is in the throes of a deep recession.