Stocks that moved heavily or traded substantially Friday: Pfizer Inc., up 51 cents to $36.70. The drug developer is asking US regulators to allow emergency use of its COVID-19 vaccine. Ross Stores Inc., down $1.21 to $108.99. The discount retailer’s third-quarter earnings and revenue beat Wall Street forecasts. Williams-Sonoma Inc., up $6.67 to $107.71. Spending on home-related goods helped the cookware and home furnishings retailer beat analysts’ third-quarter forecasts. FireEye Inc., up 91 cents to $15.15. The computer security software company is buying Respond Software and said it’s getting a $400 million investment. Hibbett Sports Inc., up 51 cents to $42.64. The sporting goods retailer reported strong online sales and handily beat analysts’ third-quarter profit forecasts. Post Holdings Inc., down $6.17 to $90.53. The maker of Alpha-Bits and Grape-Nuts cereal disappointed investors with its fourth-quarter financial report. Gilead Sciences Inc., down 52 cents to $60.11. The World Health Organisation recommended against using the biotechnology company’s remdesivir for hospitalised COVID-19 patients. UnitedHealth Group Inc., down $2.30 to $334.70. The Trump Administration is planning to release new rules that would lower prescription drug costs, according to media reports.