Foot Locker shares are down 31% this year, even after jumping 6.2% on Monday to $27. In disclosing his 5% stake in Macy's last week, Kretinsky, who tested positive for the coronavirus in March, said he planned to work with management to improve the department store chain's performance. Macy's was dropped from the S&P 500 benchmark in March and Fitch cut the company's credit rating to junk levels last month.