GLOBAL MARKETS-European banks, bonds shaken by Greek turmoil

(Adds U.S. Greek ETFs, updates prices)

* Main European stock markets down 2-3 percent

* Spanish, Italian, Portuguese government bond yields jump

* Euro proving resilient, Swiss intervene to halt franc rise

* Investors flocking to bonds, yen and gold

* PBOC easing fails to stem China share rout

By Patrick Graham

LONDON, June 29 (Reuters) - Europe's financial markets were jolted on Monday by the collapse of talks and imposition of capital controls in Greece, although initial heavy selling eased as investors judged there was still some way to run for the saga.

Banks and bond market borrowing costs for Italy, Spain and Portugal bore the brunt of markets' fright that Prime Minister Alexis Tsipras' calling of a referendum on further austerity demanded by euro zone creditors would see Greece leave the euro.

After an initial wave of selling, however, most markets recovered some ground. The one-day moves were large but looked pale in comparison to the events of 2008 or the last major round of Greek-spurred turmoil in 2011-12.

Wall Street was set to open around 1 percent lower while the FTSE Eurofirst blue chip index was down by just over 2 percent overall.

"The European financial system now has much less exposure to Greece than in 2011 and 2012," said Stephanie Flanders, Chief Market Strategist for Europe at JP Morgan Asset Management.

"It is also better equipped to deal with contagion to other countries -- and so are the countries themselves."

Greece's banks and stock market were closed on Monday and were expected to remain so until after the July 5 snap referendum called by Greek Prime Minister Alexis Tsipras on austerity demanded by euro zone partners.

That didn't stop investors from selling other related assets. The Global X FTSE Greece exchange-traded fund (ETF) , a buyable security which tracks the Athens stock market, was down around 15 percent from its Friday closing price. Euro zone banks fell 5 percent in value, with the worst falls for Portuguese, Spanish and Italian lenders.

Adding to the gloomy backdrop, China shares dived another 3.3 percent, bringing the losses in the past two weeks to 22 percent, with central bank cuts in interest and reserve rates on Saturday failing to calm jittery investors.

BUY IN

The worst fall in shares for six months and the 30 basis point rise in yields for other southern euro zone governments was the start of an acid test of policymakers' hopes that, if Greece does depart from the euro, the rest of Europe is isolated from the fallout.

By mid-morning in Europe, there were a number of voices arguing that the sell-off represented an opportunity to buy shares cheaply in markets into which the European Central Bank will pump billions of extra euros over the next year.

"I think Greece will vote to remain in the euro, and the market seems to agree with me," said Lex van Dam, a hedge fund manager at Hampstead Capital. "I was a buyer on the initial dip this morning in both the euro as well as the European stock markets, and continue to remain constructive."

The euro itself proved resilient, recovering much of a roughly 2 percent initial fall to trade just half a percent lower at $1.1102, well within the past month's ranges.

It was helped by Switzerland's National Bank (NYSE: NBHC - news) confirming it had intervened to counter gains for the franc and by a fall in U.S. Treasury yields that reflected speculation the Federal Reserve would hold off for longer in raising interest rates if the trouble in Europe worsens.

"Fed/ECB divergence bets have been partially wiped off as a result of rising Grexit risk (and) less favourable USD rate differentials slow dollar strength down," said Stephen Gallo, head of European FX Strategy with BMO in London. (Additional reporting by John Geddie, Anirban Nag, Jemima Kelly and Sudip Kar-Gupta in London, Nicola Saminather in Singapore and Hideyuki Sano in Tokyo; Editing by Andrew Heavens)