(AP) – Stocks jumped on Wall Street Tuesday as investors went back to buying following a rout the day before brought on by concerns about the spread of a more contagious variant of COVID-19. The S&P 500 index was up 1.6%. On Monday it fell 1.6%, its biggest drop since May. The spread of the more contagious delta variant has become a worry spot for investors and policymakers. While tens of millions of Americans have gotten vaccinated, there remains a significant percentage of Americans who are either reluctant or outright hostile to the idea of being vaccinated. The yield on the 10-year Treasury rose to 1.21%.