The Dow index ended slightly higher, lifted by a 4% surge in Walt Disney Co DIS.Nshares. [O/R Discovery Inc DISCA.O jumped 8.9% after the media company said it was expecting 12 million global paid streaming subscribers by the end of February, as coronavirus restrictions kept people at home. By Gertrude Chavez-Dreyfuss NEW YORK, Feb 22 (Reuters) - The S&P 500 and Nasdaq closed lower on Monday as climbing Treasury yields and prospects of rising inflation triggered valuation concerns, hitting shares of high-flying growth companies.