Reuters - Share indexes in Asia struggled to stem a bearish mood Friday after U.S. big technology company share prices fell again overnight on growing doubts about U.S. stimulus and worries about their stretched valuations.

MSCI's broadest index of Asia-Pacific shares outside Japan dipped 0.2%, hovering just above a one-month low earlier this week. Japan's Nikkei rose 0.3%.

Souring the mood, the U.S. Senate on Thursday killed a Republican bill that would have provided around $300 billion in new coronavirus aid, as Democrats seeking far more funding prevented it from advancing.

"The need for more fiscal support seems obvious, but the chances of imminent support have diminished significantly," Rodrigo Catril, senior foreign-exchange strategist at National Australia Bank in Sydney, said.

Data also showed the number of Americans filing new claims for unemployment benefits remained high last week, and the total number of people who are on unemployment benefits increased to 29.6 million.

Diplomatic and military tensions between China and the U.S. appeared to intensify as Taiwan denounced China on Thursday over large-scale air and naval drills off its southwestern coast.

U.S. technology company shares, unquestionable leaders of the world's stock recovery since late March, failed to sustain a brief rebound.

On Wall Street on Thursday, the S&P 500 lost 1.77% while the Nasdaq composite dropped 1.99%, both on course for a second straight week of losses.

The New York Stock Exchange Fang+ index of big 10 tech companies has lost 5.4% so far this week - its biggest weekly loss since the market turmoil in March if sustained by the end of Friday.

Still, the index is more than double its March low and market participants have gathered that their high valuations are justifiable in light of near zero interest rates in much of the developed world and massive liquidity the world's central banks have created.

With the world's stocks still trading near the most expensive levels relative to profit outlook since the 2000 tech bubble, some analysts called for caution.

"Global shares had rallied on expectations of economic recovery from lockdowns. But as the autumn begins (in the Northern Hemisphere), people wonder if the coronavirus infections could worsen," said Kozo Koide, chief economist at Asset Management One.

"You never know if vaccine deployment is that easy nor if banks need to aside more provisions for struggling firms in hospitality sector. Considering all that, investors are likely to question the current valuations can be justified," he said.

In the currency market, the British pound wobbled near a one-and-a-half-month low set Thursday on fears that UK- European Union trade negotiations may fall apart.

The EU told Britain it should urgently scrap a plan to break their divorce treaty, but Prime Minister Boris Johnson's government refused and pressed ahead with a draft law that could sink four years of Brexit talks. The pound traded at $1.2815, having slipped to $1.2773 overnight.

The euro changed hands at $1.1833 having briefly hit a one-week high Thursday after European Central Bank President Christine Lagarde said that while the ECB is watching the exchange rate, it is not a monetary policy tool. Traders took her comments to mean the ECB was unlikely to undertake measures to weaken the currency.

The yen was little moved at 106.18 per dollar.

Oil prices were under pressure from a surprise rise in U.S. stocks and weak demand owing to the coronavirus pandemic.

Brent crude was down 0.2% at $39.98 a barrel after falling nearly 2% Thursday. U.S. crude was flat at $37.30, having fallen 2% in the previous session.