Wall Street’s main indexes were set to rise on Tuesday, following a steep selloff in the previous session, as strong quarterly earnings from Nike and a positive forecast from chipmaker Micron helped lift sentiment. A rapidly spreading Omicron variant of the coronavirus has rattled stock markets around the world, triggering major routs in the final month of the year due to worries about the strain’s impact on global economic recovery. Shares of Nike Inc. rose 4.0 percent, leading to gains among Dow components trading premarket. It beat quarterly estimates for profit and revenue, and sounded confident of a letup in supply chain problems in its next fiscal year. Micron Technology Inc. led gains among chipmakers, with a jump of 8.4 percent, after it forecast upbeat second-quarter earnings and topped Wall Street expectations for quarterly profit and revenue. Their positive updates helped allay some concerns about broader supply chain constraints in …