(Updates with U.S. markets; changes dates; previous LONDON) * World FX rates tmsnrt.rs/2egbfVh * Dollar index back below 90; euro above $1.22 * U.S. 10-year Treasury yield fell to 1.591% * Global asset performance tmsnrt.rs/2yaDPgn NEW YORK, May 25 (Reuters) - World equity markets made gains while the U.S. dollar hit new lows against major currencies on Tuesday after Federal Reserve officials reaffirmed a dovish monetary policy stance that eased inflation concerns. Investors weighed the Fed’s soothing words that put to rest tapering worries for the time being and helped to drive the dollar to four-and-a-half-month lows. The benchmark 10-year Treasury note also hit two-week lows and was at 1.5774% in early afternoon trading, down from 1.608% late on Monday. The yield curve flattened for a fourth straight session, as participants bought the long end of the curve on the view that price pressures would be stable for the rest of the year. “People are starting to come around to the notion that the Fed is right to be careful about inflation because of the difficulties of COVID around the world,” said Jamie Cox, Managing Partner at Harris Financial Group in New York. MSCI’s broadest index of world stocks was up 0.23% at 707.83. The STOXX index of leading European shares gained 0.03% to 445.20 after hitting a record high of 447.15. On Monday, Fed Board Governor Lael Brainard assuaged inflation concerns, saying she expects that price spikes associated with supply bottlenecks and the reopening of the economy to “subside over time.” James Bullard, president of the St. Louis Federal Reserve, also said on Monday that while still in the pandemic, it was not the time to talk more about changing the parameters of monetary policy. Those messages were consistent with what Fed Chairman Jerome Powell has said repeatedly over recent weeks. On Wall Street, the Nasdaq Composite rose 0.02% to 13,663.67, although the benchmark the S&P 500 was down 0.05% at 4,194.96 and the Dow Jones Industrial Average fell 0.02% to 34,388.42. Some of the most active sectors on Wall Street include technology, industrials, customer discretionary, communication services and financials. “The reason why we are having some inflationary pressures is because Asia is having difficulties and that will work itself out and I think price increases like that are not long lasting,” Cox said. Overnight in Asia, the region’s main regional equity gauges climbed, with MSCI’s broadest index of Asia-Pacific shares outside Japan up 1.5% at a two-week high. Oil prices were little changed on Tuesday as rising demand from the approach of the northern hemisphere’s summer driving season and lifting of coronavirus restrictions offset worries that Iran’s possible return to the market will cause supplies to jump. Brent futures rose 16 cents to $68.62 a barrel in early afternoon trading, while U.S. West Texas Intermediate (WTI) crude rose 19 cents to $66.24. Gold prices scaled a more than four-month peak, as the dollar and U.S. Treasury yields slumped after data showed consumer confidence dropped slightly in the United States. The dollar index, which measures the currency against major rivals, was down 0.72% in the afternoon session, after having fallen as much as 0.3% to 89.533, its lowest since Jan. 7. Spot gold was trading up 0.66% to $1,893.53 per ounce, having earlier hit its highest since Jan. 8 at $1,895.56. U.S. gold futures gained 0.48% to $1,893.7 Reporting by Chibuike Oguh in New York; Editing by Dan Grebler Our Standards: The Thomson Reuters Trust Principles.