US STOCKS-Trade optimism propels S&P 500, Nasdaq to record highs; Apple biggest boost

(For a live blog on the U.S. stock market, click or type LIVE/ in a news window.)

* U.S.-China 'very close' to trade deal - report

* Trade-sensitive chip stocks surge

* Tiffany jumps after $16.2 bln buyout offer from LVMH

* TD Ameritrade rises on $26 bln deal with Charles Schwab

* Indexes up: Dow 0.54%, S&P 0.67%, Nasdaq 1.15% (Updates to open)

By Arjun Panchadar

Nov 25 (Reuters) - Apple Inc and semiconductor stocks powered the S&P 500 and Nasdaq indexes to record highs on Monday, after a report signaled that the United States and China were nearing a trade truce, with sentiment also buoyed by a raft of mega deals.

Trade-sensitive Intel Corp and Applied Materials Inc helped lift the Philadelphia Semiconductor index 2.1% as a Chinese state-backed tabloid said Beijing and Washington were "very close" to an initial pact.

That added to optimism from comments over the weekend by a top U.S. official that an agreement was still possible by the end of the year, dispelling fears that the negotiations could carry on into 2020.

"The mood is pretty positive at this point," said Scott Brown, chief economist at Raymond James in St. Petersburg, Florida.

"You got mergers today, which are typically positive for the market, and I think you still have some optimism that there's going to be a trade deal."

Trade deal hopes and robust third-quarter corporate earnings have helped Wall Street's main indexes hit record highs this month.

Gains on Monday were broad-based, with the tech-heavy Nasdaq firming over 1% and 10 of the 11 major S&P 500 sectors higher. Apple Inc rose 1.3% and was the biggest boost to all the three main indexes.

At 10:34 a.m. ET, the Dow Jones Industrial Average was up 149.97 points, or 0.54%, at 28,025.59, while the S&P 500 was up 20.90 points, or 0.67%, at 3,131.19. The Nasdaq Composite was up 98.30 points at 8,618.19.

In M&As, Tiffany & Co jumped 6.2% after the luxury jeweler agreed to a sweetened $16.2 billion deal with France's LVMH.

U.S. discount brokerage TD Ameritrade Holding Corp was up 6% after larger rival Charles Schwab Corp said it would buy the company in an all-stock deal valued at about $26 billion. Schwab was up about 1.5%.

EBay Inc gained 1.3% after the e-commerce major said it would sell ticketing unit StubHub to ticket reseller Viagogo for $4.05 billion in cash.

Advancing issues outnumbered decliners by a 3.72-to-1 ratio on the NYSE and by a 3.69-to-1 ratio on the Nasdaq.

The S&P index recorded 29 new 52-week highs and one new low, while the Nasdaq recorded 70 new highs and 34 new lows. (Reporting by Arjun Panchadar and Manas Mishra in Bengaluru; Editing by Sriraj Kalluvila)