* Fed cut fails to halt slide; S&P 500 drops 2.8%
* Australia down 1.3%, Nikkei flat
* Dollar slides vs Asian currencies
* Asian stock markets: https://tmsnrt.rs/2zpUAr4
By Tom Westbrook
SINGAPORE, March 4 (Reuters) - Asian shares wobbled on Wednesday and bonds held gains, as an emergency rate cut from the U.S. Federal Reserve did little to soothe investor fears over the coronavirus's widening fallout.
The surprise 50 basis point cut came with commentary highlighting the limits of monetary policy, and Wall Street indexes fell sharply, gold surged and the dollar sank. .N
The yield on benchmark 10-year U.S. Treasuries, which falls when prices rise, hit a once unimaginable low of 0.9060%. US/
In Asia, MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS edged 0.2% higher, after easing hopes drove gains on Tuesday.
Australia's S&P/ASX 200 index .AXJO fell 1.2% and Japan's Nikkei .N225 was either side of flat in choppy trade. .T
E-mini futures for the S&P 500 ESc1 were volatile and last traded 0.8% firmer.
The U.S. 10-year Treasury yield US10YT=RR drifted below Wednesday's close to 0.9716% and the dollar pared losses after touching a five-month low against the safe-haven Japanese yen JPY= . FRX/
"We do recognise that a rate cut will not reduce the rate of infection, it won't fix a broken supply chain; we get that," Fed Chairman Jerome Powell told reporters at a press conference -- sending stocks from 2% gains back into the red. Dow Jones industrial average .DJI , Nasdaq composite .IXIC and S&P 500 .SPX each closed down close to 3%.
"Powell's comments have delivered a reality check for markets, but also highlight the need for fiscal side to do more," said National Australia Bank FX strategist Rodrigo Catril.
"As the Fed Chair noted, the Fed does not have all the answers."
More than 3,000 people have been killed by the coronavirus, about 3.4% of those infected - far above seasonal flu's fatality rate of under 1%.
It continues to spread quickly beyond the outbreak's epicentre in China, with Italy overnight reporting a jump in deaths to 79. of the economic cost are rising, too, since the pathogen and the lockdowns applied to try and stop it spreading have paralysed supply chains and all but frozen global travel.
S&P Global Ratings cut its U.S. growth forecast for a second time on Tuesday and the Organisation for Economic Cooperation and Development has warned the world is headed for its worst downturn since the financial crisis more than a decade ago. question here is whether a conventional interest rate response is sufficient, or whether it requires also a fiscal response," said Sameer Goel, chief strategist, Asia macro, at Deutsche Bank (DE:DBKGn) in Singapore.
"It's not an economic shock, it's a shock driven by a non-economic factor. It's still not clear how big the problem ultimately is, or could be, and until you know that, it's hard to know how much medicine to apply to it."
In currencies, the U.S. dollar fell across the board, sending it to an eight-week low against a basket of currencies =USD , while pushing the euro EUR= to an eight-week peak.
In Asian morning trade, the yen hit its highest against the greenback since October, at 106.84 per dollar, before paring gains to trade flat. The Australian dollar AUD=D3 advanced to $0.6603.
Oil prices steadied, with Brent settling at $51.86 per barrel LCOc1 and U.S. crude 0.4% firmer at $47.37 a barrel CLc1 . Gold rose 0.4% to $1645.25 an ounce XAU= .
(Editing by Sam Holmes)