* All 11 S&P 500 sectors trading in the red
* CVS Health gains after raising 2021 profit view
* Indexes down: Nasdaq 2.73%, S&P 1.34%, Dow 0.69% (Updates prices to early afternoon)
By Shreyashi Sanyal and Sruthi Shankar
May 4 (Reuters) – The Nasdaq fell more than 2% on Tuesday as steep declines in megacap growth stocks pushed Wall Street below record trading levels, with investors seeking shelter in more defensive parts of the market.
Highly valued technology companies including Microsoft…