Almost 50% of Fund Managers are Overweight the Healthcare Sector $GILD $PFE $INO $MRNA $JNJ $GSK $SPY Investors are diversifying bets in the healthcare sector, as the rush to develop treatments for C-19 coronavirus has driven up prices for some Big Pharma stocks. Now at least 48% of fund managers are overweight healthcare stocks, a BofA survey showed, and the S&P 500 healthcare sector is up nearly 34% since its March low.