Global stocks slide, bonds surge as Brexit fears resurface

By Wayne Cole and Hideyuki Sano

TOKYO (Reuters) - Asian share markets turned tail on Wednesday as fears over instability in the European Union returned with a vengeance, sending the pound to three-decade lows and hammering risky assets of all stripes.

In wild trading reminiscent of the fateful Friday when Britain voted to abandon the EU, sterling shed a full U.S. cent in a matter of minutes to crater at $1.2798.

Concerns that central banks might not be able to soften this latest blow to global growth hit oil prices hard. Having shed 5 percent on Tuesday, Brent crude futures fell further to $47.57, with U.S. crude at $46.21.

Spooked investors rushed into safe-haven sovereign debt and took markets deeper into unknown territory.

Yields on U.S. Treasuries, the benchmark for bonds worldwide, hit record lows out to 30 years. Investors had to pay Japan 0.27 percent to lend it money for 10 years.

"There's no inflation prospects, there's no strong growth. The only thing we have is uncertainty," said Hiroko Iwaki, senior bond strategist at Mizuho Securities.

The sudden mood swing saw Japan's Nikkei skid 3 percent, while MSCI's broadest index of Asia-Pacific shares outside Japan fell 1.7 percent.

Since Britain's shock decision to exit the EU two weeks ago, investors have been consoling themselves with the expectation of yet more policy easing from major central banks.

Yet analysts, and many at the banks themselves, have warned that the scope for manoeuvre was strictly limited and any new steps could prove counter-productive.

"Financial markets appear to have taken a more realistic view around the complexity and uncertainty characterising the global political background and its impact on already lacklustre economic growth," wrote analysts at ANZ in a note.

"This suggests the tug-a-war between more central bank support and economic fundamentals is going to increase, driving market volatility."

STERLING SINKS, GOLD BUOYANT

The pound was again a major casualty, cracking support at $1.3000 and $1.2950 to last stand at $1.2867 in fast-moving trade. This was ground not visited since 1985 when it got as far as $1.2565 - depths that could be revisited all too soon.

Against the yen, it fell below 131.00 for the first time since late 2012, while the euro scored a 2-1/2 year high around 85.00 pence.

The Japanese yen benefited broadly as a traditional safe harbour and climbed to 100.67 per U.S. dollar. Likewise, spot gold hit its highest since early 2014 at $1,371.40.

Perhaps taking advantage of the focus on sterling, Beijing allowed the yuan to fall to the lowest since late 2010 and gain a competitive advantage for its exports.

Dealers said there was no one event behind the manic moves, but rather an accumulation of negative factors.

Three British commercial property funds worth about 10 billion pounds suspended trading as asset prices plunged, while the Bank of England had to take action to ensure local banks kept lending.

Across the channel, shares in Italy's banks tumbled, shaking the financial foundations of the euro zone's third-largest economy.

"Italy faces a severe crisis that is exponential. This is not gradual and not linear," said Francesco Galietti, head of the Policy Sonar risk consultancy and a former finance ministry official. "The immediate trigger is the banking crisis."

(Reporting by Wayne Cole and Hideyuki Sano; Editing by Eric Meijer and Kim Coghill)