Japan's Nikkei slumps 3% as tech stocks tumble on AI worries

TOKYO, Oct 30 (Reuters) - Japan's Nikkei share average dropped as much as 3% on Friday, led by chip-related stocks, as concerns mounted over the sustainability of spending to fund the AI boom.

Tokyo tracked overnight losses on Wall Street, and were given additional impetus by late earnings from Amazon.com AMZN.O and Intel INTC.O that showed massive cash burns, sending shares of those companies and their peers sharply lower in extended trading.

"This can be seen as a sign of growing concerns regarding the profitability of AI investments, which is weighing on share prices," said Maki Sawada, an equities strategist at Nomura Securities. "The Japanese stock market is being affected by this fall in US technology shares."

The Nikkei .N225 was down 2.8%, as of 2003 GMT, after earlier slumping 3%, led lower by chip equipment heavyweights Advantest 6857.T and Tokyo Electron 8035.T, which plunged 9.1% and 5.6%, respectively.

Trading has been volatile this week as earnings reports from Japan, the US and South Korea triggered sharp swings in technology stocks.

For the week, the Nikkei remains up 0.2%.

By contrast, the broader Topix .TOPX was down a milder 1.3% on Friday, but set to lose 0.4% this week.

Beyond earnings, falling crude oil prices on optimism over Middle East peace talks supported Japanese stocks. Resource-poor Japan depends heavily on energy imports, especially from the Middle East.

The Bank of Japan will announce its policy decision on Friday and is widely expected to leave interest rates unchanged, although investors will be watching for signals on the likelihood of a rate hike at its December meeting.

Among the Nikkei's 225 components, 123 fell versus 100 that rose, with two trading flat.

Along with Advantest and Tokyo Electron, other notable chip and AI losers included Ibiden 4062.T, down 15.2%, Lasertec 6920.T, down 13.8%, and SoftBank Group 9984.T, down 6.7%.

Earnings also produced some standout performers, with game maker Konami 9766.T jumping 15.3% to become the Nikkei's biggest percentage gainer. Oriental Land 4661.T, the operator of Tokyo Disney Resorts, followed with a 6.6% gain.