* Technology-related companies resume slide * Discovery rises on strong paid streaming subscribers forecast * Dow up 0.44%, S&P 500 down 0.21%, Nasdaq down 1.41% (Updates to mid-afternoon, adds analyst comments, updates prices) NEW YORK, Feb 22 (Reuters) - The S&P 500 and Nasdaq fell on Monday as climbing Treasury yields and prospects of rising inflation triggered valuation concerns, hitting shares of high-flying growth companies. The Dow index, on the other hand, was higher, boosted by a 5% gain in Walt Disney Co. U.S. benchmark 10-year Treasury yields were up at 1.36% on Monday. Since the beginning of February, 10-year yields have risen about 26 basis points, on track for their largest monthly gain in three years. “Investors are a little nervous about Treasury yields rising so quickly and it has been a pretty quick move in a short period of time,” said Lindsey Bell, chief investment strategist at Ally Invest, in Charlotte, North Carolina. “What investors are grappling with ... is what does this mean from an inflation perspective. Because of that, there’s a little bit of tantrum in the market right now,” she added. Federal Reserve Chair Jerome Powell is scheduled to speak before the Senate Banking Committee on Tuesday, and investors are expected to look for any potential changes to the central bank’s dovish outlook in recent months. Shares of Apple Inc, Microsoft Corp, Alphabet Inc, Tesla Inc and Amazon.com Inc resumed their slide from the previous week, falling between 0.9% and 5%. Largely upbeat fourth-quarter earnings had powered Wall Street’s main indexes to record highs earlier last week, but the rally lost steam, in part due to fears of a potential snag in U.S. vaccination efforts and inflation concerns emanating from a raft of stimulus measures. In afternoon trading, the Dow Jones Industrial Average rose 137.26 points, or 0.44%, to 31,631.58, the S&P 500 lost 8.3 points, or 0.21%, to 3,898.41 and the Nasdaq Composite dropped 195.70 points, or 1.41%, to 13,678.76. The S&P 500 was on track for a five-day losing streak, its worst in one year. Value stocks have outperformed growth shares in February, with investors betting on a rebound in industrial activity and a pickup in consumer demand as countries roll out vaccines to tame the pandemic. The S&P 500 industrials and financial sector rose 0.8% and 1.1%, respectively, while energy stocks surged 4.5% on higher oil prices. [O/R Discovery Inc jumped 9.5% after the media company said it was expecting 12 million global paid streaming subscribers by the end of February, as coronavirus-led restrictions kept people at home. Kohl’s Corp gained 7.9% after a group of activist investors nominated nine directors to the department store chain’s board. Principal Financial Group Inc added 8.8% after a media report that activist investor Elliott Management Corp had taken a stake in the life insurance company and planned to push for changes. Advancing issues outnumbered declining ones on the NYSE by a 1.14-to-1 ratio; on Nasdaq, a 1.17-to-1 ratio favored decliners. The S&P 500 posted 71 new 52-week highs and no new lows; the Nasdaq Composite recorded 252 new highs and 10 new lows. (Reporting by Gertrude Chavez-Dreyfuss in New York Additional reporting by Devik Jain and Shreyashi Sanyal in Bengaluru Editing by Matthew Lewis)