* Asian stock markets : https://tmsnrt.rs/2zpUAr4
* Nikkei leads Asia lower, S&P 500 futures recoup early losses
* China, Singapore ease monetary policy
* U.S. extends social distancing guidelines to end of April
* Treasury bonds rally further, yield curves flatten
* Oil on the slide as supply engulfs demand
By Wayne Cole
SYDNEY, March 30 (Reuters) - Asian shares slipped on Monday and oil prices took another tumble as fears mounted that the global shutdown for the coronavirus could last for months, doing untold harm to economies despite central banks' best efforts.
"We continue to mark down 1H20 global GDP forecasts as our assessment of both the global pandemic's reach and the damage related to necessary containment policies has increased," said JPMorgan (NYSE:JPM) economist Bruce Kasman.
They now predict global GDP could contract at a 10.5% annualised rate in the first half of the year.
There was much uncertainty about whether funds would have to buy or sell for month- and quarter-end to meet their benchmarks, many of which would have been thrown out of whack by the wild market swings seen over March.
Japan's Nikkei .N225 dropped 2.7% and Shanghai blue chips .CSI300 1.8%. MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS lost 0.7%, though that was up from early lows.
E-Mini futures for the S&P 500 ESc1 also recouped early losses to edge up 0.3%, perhaps thanks to month-end demand. EUROSTOXXX 50 futures STXEc1 firmed 0.5% and FTSE futures FFIc1 went flat.
Central banks have mounted an all-out effort to bolster activity with rate cuts and massive asset-buying campaigns, which have at least eased liquidity strains in markets.
China on Monday became the latest to add stimulus with a cut of 20 basis points in a key repo rate. also eased as the city-state's bellwether economy braced for a deep recession, while New Zealand's central bank said it would take corporate debt as collateral for loans. Catril, a senior FX strategist at NAB, said the main question for markets was whether all the stimulus would be enough to help the global economy withstand the shock.
"To answer this question, one needs to know the magnitude of the containment measures and for how long they will be implemented," he added. "This is the big unknown and it suggests markets are likely to remain volatile until this uncertainty is resolved."
It was not encouraging, then, that British authorities were warning lockdown measures could last months. President Donald Trump on Sunday extended guidelines for social restrictions to April 30, despite earlier talking about reopening the economy for Easter. on Monday expanded its entry ban to include citizens travelling from the United States, China, South Korea and most of Europe. NOT DONE YET
Bond investors looked to be bracing for a long haul with yields at the very short end of the Treasury curve turning negative and those on 10-year notes US10YT=RR dropping a steep 26 basis points last week to last stand at 0.65%.
That drop has combined with efforts by the Federal Reserve to pump more U.S. dollars into markets, and dragged the currency off recent highs.
Indeed, the dollar =USD suffered its biggest weekly decline in more than a decade last week. USD/
Against the yen, the dollar was pinned at 107.53 JPY= , well off the recent high at 111.71. The euro edged back to $1.1088 EUR= , after rallying more than 4% last week.
"Ultimately, we expect the USD will soon reassert itself as one of the strongest currencies," argued analysts at CBA, noting the dollar's role as the world's reserve currency made it a countercyclical hedge for investors.
"This means the dollar can rise because of the deteriorating global economic outlook, irrespective of the high likelihood the U.S. is also in recession."
The dollar's retreat had provided a fillip for gold, but fresh selling emerged on Monday as investors were forced to liquidate profitable positions to cover losses elsewhere. The metal was last off 0.3% at $1,611.42 an ounce XAU= . GOL/
Oil prices were again under water as Saudi Arabia and Russia showed no signs of backing down in their price war even as global transport restrictions hammer demand. O/R
Brent crude LCOc1 futures lost $1.46 to $23.47 a barrel, while U.S. crude CLc1 fell 97 cents to $20.54.
<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Asia stock markets
https://tmsnrt.rs/2zpUAr4 Asia-Pacific valuations
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^> (Editing by Sam Holmes and Jacqueline Wong)