Swine flu worried investors but wasn’t enough to spark a full-scale sell-off today, the Financial Times reports. AMR, parent of American Airlines, Marriott, and Expedia fell as investors bet against firms that may be specifically hurt. Shares of Gilead Sciences, developer of Tamiflu, were up nearly 4%, however. The Dow closed down 51.29 at 8,025.00. The Nasdaq lost 14.88, to 1,679.41, while the S&P 500 lost 8.72, settling at 857.51.