(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window.) * Economy-linked sectors lead early market gains * Tesla rises on report of India entry next year * Indexes up: Dow and S&P 0.7%, Nasdaq 0.6% (Updates to market open) Dec 28 (Reuters) - Wall Street’s main indexes hit record highs on Monday as President Donald Trump’s signing of a long-awaited $2.3 trillion pandemic aid bill bolstered bets on an economic recovery and drove gains in financial and energy stocks. In a sudden reversal late on Sunday, Trump backed down from his threat to block the hard-fought bill, restoring unemployment benefits to millions of Americans and averted a federal government shutdown. “Trump signing the COVID relief and government spending bill has gotten uncertainty out of the way, and the market right now is on autopilot - creeping its way higher into the new year,” said Sam Stovall, chief investment strategist at CFRA Research. All the 11 major S&P sectors were higher, with financial , energy and industrials among the biggest gainers. The S&P 1500 airlines index added 2.2% as carriers are set to receive $15 billion in addition payroll assistance under the new government aid. Cruise operators Royal Caribbean Cruises Ltd, Carnival Corp and Norwegian Cruise Line Holdings Ltd also rose between 3.3% and 4.3%. Trading volumes are expected to be thin in the final week of the year that has historically been a seasonally strong period for equities. After a sharp recovery from a coronavirus crash in March, the S&P 500 is on track to rise more than 15% this year on the back of a loose monetary policy, high liquidity and a COVID-19 vaccine program. At 09:51 a.m. ET, the Dow Jones Industrial Average rose 204.85 points, or 0.68%, to 30,404.72, the S&P 500 gained 25.82 points, or 0.70%, to 3,728.88 and the Nasdaq Composite gained 81.25 points, or 0.63%, to 12,885.98. Democrats in the U.S. Congress on Monday will put to vote a proposal for higher pandemic relief payments for Americans, although it appears unlikely to gain traction in the Republican-controlled Senate. Fueling a global appetite for risk, Britain and European Union clinched a lean post-Brexit trade deal on Thursday, while the launch of a mass COVID-19 vaccination drive in Europe over the weekend added to the upbeat mood. Tesla Inc rose 2% after a report that the electric-car maker will start operations in India early next year. Advancing issues outnumbered decliners by a 2.9-to-1 ratio on the NYSE and by a 2.1-to-1 ratio on the Nasdaq. The S&P 500 posted 23 new 52-week highs and no new lows, while the Nasdaq recorded 308 new highs and nine new lows. (Reporting by Devik Jain and Supriya R in Bengaluru; Editing by Anil D’Silva)