Asian stocks advanced on Thursday, propelled by strong U.S. earnings and oil prices near a 15-month high, as the third and final U.S. presidential debate before the Nov. 8 election ended.

SINGAPORE (Reuters) - Asian stocks advanced on Thursday, propelled by strong U.S. earnings and oil prices near a 15-month high, as the third and final U.S. presidential debate before the Nov. 8 election ended.

MSCI's broadest index of Asia-Pacific shares outside Japan rose 0.2 percent. Japan'sNikkei extended gains to 1 percent.

China's CSI 300 reversed earlier gains to fall 0.1 percent, while Hong Kong'sHang Seng index climbed 0.5 percent.

In the final debate between Republican presidential candidate Donald Trump and Democrat Hillary Clinton, Trump tried to reverse the momentum in an election that polls show is tilting away from him.

"Never in the history of the U.S. has a candidate faced such a deficit in the polls as Trump currently holds, with at least two well-known sites (that model the probability of the outcome) putting an 85-90 percent chance of a Clinton win," Chris Weston, chief market strategist at IG in Melbourne, wrote in a note."But as 2016 has shown us, not just in politics, but in markets too, it can often pay to expect the unexpected."

At the end of the debate, the Mexican peso had inched up against the dollar.

The U.S. dollar slipped 0.2 percent to 18.46 pesos, extending losses to 2.9 percent this week.

Trump's radical positions on Mexican migration and trade could severely disadvantage the U.S's southern neighbor if he wins, so a stronger Mexican peso reflects lower market expectations of a Trump win.

Trump refused to say in the debate whether he would accept the outcome of the Nov. 8 election, after earlier urging supporters to patrol polling places in inner cities to prevent voter fraud.

Trump and Clinton sparred over the influence of Vladimir Putin, with Clinton calling Trump the Russian president's puppet and Trump claiming Putin had repeatedly outsmarted Clinton.

Trump also accused Clinton's campaign of orchestrating a series of accusations by women who said the businessman made unwanted sexual advances against them, saying the stories were "totally false."

Overnight, the S&P 500 index and the Dow Jones Industrial Average closed up 0.2 percent, after Morgan Stanley (NYSE:MS) posted a better-than-expected quarterly profit to round out a string of solid results from big U.S. banks.

With 70 companies in the S&P 500 having reported earnings through Wednesday morning, 80 percent have topped earnings expectations. Third quarter earnings are now expected to increase 0.5 percent, according to Thomson Reuters I/B/E/S, which would be the first quarter of growth in five.

"We're up because the (earnings) numbers are so great, the forward guidance is great and the banks just knocked it out of the park," said Ken Polcari, Director of the NYSE floor division at O'Neil Securities in New York.

Energy shares also contributed to the gains on Wall Street, as oil prices jumped after a surprisingly large inventory drop of 5.2 million barrels, compared with a forecast for a 2.7-million barrel build. It was the sixth week of declines in seven weeks.

U.S. crude slid 0.4 percent to $51.39 on Thursday, after surging 2.6 percent to close at $51.60 in the previous session. It earlier touched $51.93, the highest since July 2015.

Brent crude slipped 0.2 percent to $52.56 on Thursday, after climbing 1.9 percent on Wednesday.

The dollar was steady at 103.52 to 103.62 yen on Thursday after falling 0.4 percent on Wednesday.

The Australian dollar retreated 0.4 percent to $0.7692 after data showed Australia shed a whopping 53,000 full-time jobs in September, although unemployment held at a three-year low of 5.6 percent.

The euro was flat at $1.0979, ahead of the European Central Bank's policy meeting on Thursday.

Investors are focused on whether ECB President Mario Draghi will give any indication of if and when the central bank may begin tapering its bond purchase program.