* Emerging stocks fall 1.7 pct to 1-month lows
* Central European bourses down over 2 pct; yields up
* Forint at 2-month low
By Sujata Rao
LONDON, April 28 (Reuters) - Contagion from the euro zone periphery swept through emerging markets on Wednesday, triggering a 1.7 percent fall on equities while sovereign bond yield spreads over Treasuries hovered at one-month highs.
The ripples from Greece have spread as far afield as India and Mexico where shares fell sharply in the wake of a 30 percent jump in the VIX volatility index and the dollar's rise to 11-month highs against a basket of major currencies.
The global selloff started on Tuesday after a triple-notch ratings downgrade took Greece into "junk" territory while Portugal received a two-notch ratings cut. Greek ratings are now below those of Iceland and just above Latvia, both of which have been kept afloat by IMF rescue packages.
MSCI emerging stocks extended the previous session's 1.5 percent losses, falling another 1.8 percent <.MSCIEF> to one-month lows.
Emerging sovereign bonds on the EMBI Plus index <11EMJ> saw yield premiums over U.S. Treasuries widen 3 bps to 267 bps. The premium rose 20 bps on Tuesday as Treasury yields dropped.
"This is classic risk aversion when everything is falling, apart from the dollar and Treasuries," said Gyula Toth, emerging markets strategist at Unicredit in Vienna. "When that happens there is nowhere else to hide."
Central European assets bore the brunt of the selling. Stock markets in Budapest, Warsaw, Prague and Bucharest plunged over 2 percent while bond yields spiked -- Hungarian yields for instance jumped 30-40 bps across the curve.
Losses were heavy elsewhere also. Oil's slide of 3 percent so far this week pushed Moscow <
> down 2 percent while mining-heavy Johannesburg shares fell 2.3 percent <.JTOPI>.In Asia, India fell 1.7 percent <
>, Korea < > and Hong Kong lost 0.9 percent and 1.5 percent < > respectively.Emerging assets have been largely resilient to the woes of debt-laden Greece and Portugal, with some sectors such as local central European bonds actually said to have benefited from crossover flows from the euro zone periphery.
But Toth said more falls could ensue now in emerging Europe where Western European banks have a big presence.
"Sooner or later, banks that hold Greek risk will have to take credit losses and there could be an indirect impact on Eastern Europe...if the parent banking sector takes a hit via Greek exposure," he added.
Credit default swaps across central Europe rose 5-10 bps across the board, with Hungary's five-year CDS quoted up six basis points at 223 bps while Turkey rose 8 bps to 192 bps.
But this pales in comparison with a 50 bps jump in Greek CDS, which are now quoted over 900 bps for five years, surpassing Venezuela which was considered the riskiest of all the sovereigns tracked by CMA DataVision.
For the time being however, the emerging sovereign with one of the highest public debt levels, Hungary, was being punished the hardest, though domestic factors contributed.
The forint fell 0.6 percent to its lowest in more than two months <EURHUF=> against the euro, a day after suffering its biggest one-day fall in almost a year.
Sentiment on Hungary was hurt after Prime Minister-elect Viktor Orban called for central bank governor Andras Simor to quit, calls that were repeated by members of his party.
"It seems the relationship between the central bank and the government is not going to be too good and the market does not like that," Toth of Unicredit said.
Other regional currencies fell to a lesser extent, the zloty down half a percent to seven-week lows <EURPLN=> and the Czech crown falling 0.3 percent to the euro <EURCZK=>.
A Polish central bank meeting is expected to leave rates unchanged but markets are waiting for the post-meeting statement to see if any rate cuts were discussed.
The Turkish lira eased to a three-week low against the dollar <TRY=> while stocks fell 1.5 percent <
> but bond prices held up, thanks to a 1.5-billion lira injection from the central bank.That action helped benchmark 2-year yields recover to around 9.25 percent after surging to 2010 highs around 9.40 percent.
Many analysts say that after the initial knee-jerk reaction, the better emerging credits could see some stabilisation especially once the IMF rescue package for Greece comes through.
"It's going to affect sentiment in the short term towards emerging markets but it's not going to affect the long-term view -- the debt levels in Greece are extremely high, that's not the case in emerging markets," said Daniel Tubbs, who co-manages $2 billion in emerging equities at Blackrock.
(Additional reporting by Carolyn Cohn; Editing by Ron Askew)