Dec 28 (Reuters) - Wall Street’s main indexes hit record highs in early trading on Monday as President Donald Trump’s signing of a long-awaited $2.3 trillion pandemic aid bill bolstered bets on an economic recovery, helping financial and energy stocks. The Dow Jones Industrial Average rose 83.4 points, or 0.28%, at the open to 30,283.23. The S&P 500 rose 20.0 points, or 0.54%, at the open to 3,723.03, while the Nasdaq Composite rose 109.9 points, or 0.86%, to 12,914.641 at the opening bell. (Reporting by Medha Singh in Bengaluru; Editing by Anil D’Silva)