Japan's Nikkei climbed 3.0 percent and South Korea added 3.4 percent, continuing its run of wild swings. MSCI's broadest index of Asia-Pacific shares outside Japan rose 1.5 percent.

Not all tech firms benefited equally though.

Investors appeared to be taking profits on AMD even as its results beat forecasts. Shares in the chipmaker sank 9 percent after the bell.

AI and satellite group SpaceX shed 7.5 percent, undoing much of a rally in regular trading time, on worries capex spending was eating up all its cash flow.

This has been a recurring concern for all AI stocks given the vast cost of compute power, with borrowing costs for the sector continuing to rise.

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"SpaceX continues to execute strongly operationally, but its ambitious investment program means additional capital will almost certainly be required over the medium to longer term," said Chris Weston, head of research at broker Pepperstone.

"How management funds that growth, and at what cost, is likely to remain a central theme for investors over the coming quarters."

Nasdaq futures dipped 0.1 percent on the earnings results, while S&P 500 futures added 0.2 percent after hitting all-time highs on Tuesday. EUROSTOXX 50 futures gained 0.3 percent, while DAX futures rose 0.5 percent and FTSE futures added 0.1 percent.

Oil slide boosts bonds

Sentiment was supported by an ongoing slide in oil prices as Qatar said mediators were making progress in efforts to end the US-Iran war, though details were lacking.

Brent crude eased 0.4 percent to $79.02 a barrel, a long way from its July top of $102, while US crude dropped 0.5 percent to $75.35.

The pullback in oil provided some relief from inflation fears and boosted bonds globally, with 10-year Treasury yields now at 4.6187 percent, down from last week's high of 4.747 percent.

Markets also sharply pared the probability of a September rate hike from the Federal Reserve to 57 percent from 67 percent.

Fed Bank of Kansas City President Jeff Schmid, however, used a speech on Tuesday to call for tighter policy to help bring inflation back to the central bank's 2 percent target.

Currencies were mostly quiet, though the New Zealand dollar slipped 0.2 percent after data showed unemployment hit a decade peak of 5.6 percent in the June quarter.

The euro was flat at $1.1532 EUR, just short of its recent six-week high at $1.1559. The dollar was a shade lower on the yen at 157.53, with the threat of intervention lingering over traders.

US Treasury Secretary Scott Bessent said he was sure Bank of Japan Governor Kazuo Ueda will "do what is best" for the country's economy, which markets took as encouragement to raise interest rates further.

Japan and the United States launched a rare joint yen-buying intervention last week and vowed to take further action if needed to shore up the currency.

In commodity markets, the drop in yields helped non-interest-paying gold edge up 0.1 percent to $4,080 an ounce.

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