O/R Megacap growth and technology companies such as Apple Inc AAPL.O and Microsoft CorpMSFT.Orose over 3% respectively, while banks <.SPXBK> advanced 3%. By Echo Wang Oct 3 (Reuters) - Wall Street's three major indexes rallied to close over 2% on Monday as U.S. Treasury yields tumbled on weaker-than-expected manufacturing data, increasing the appeal of stocks at the start of the year's final quarter. The U.S. stock market has suffered three quarterly declines in a row in a tumultuous year marked by interest rate hikes to tame historically high inflation, and concerns about a slowing economy.