* Stocks stay at three-week lows after 1.6 pct fall
* Turkish stocks rise over 1 pct; lira up 0.5 pct
* zloty steadies vs dollar after 2.7 pct fall
By Sujata Rao
LONDON, April 19 (Reuters) - Emerging equities traded at three-week lows on Tuesday, extending a 1.6 percent decline in the previous session triggered by a downgrade of the U.S. ratings outlook, but Turkish assets bounced back.
Mounting speculation that Greece will restructure its debt and Standard & Poor's threat to cut the United States' triple-A credit rating fuelled a frantic unwinding of carry trades during the previous session, with investors dumping riskier assets in favour of the yen <JPY=> and the dollar.
Markets steadied somewhat on Tuesday but sentiment remained shaky, with investors also worrying about the outlook for China. The MSCI emerging equities index <.MSCIEF> dipped 0.2 percent to its lowest level since the end of March, extending losses into a fourth straight session.
Emerging European markets, however, were trading on a more optimistic note than their Asian peers with most bourses in the region in positive territory.
"The market is taking a few steps back ... Yesterday's move was a reflex action caused by all the bad news we still have on the major economies. This volatile and nervous market situation will last a while as there are so many problems still unsolved in the developed world," said Arvid Bohm, emerging equity strategist at SEB in Stockholm.
He noted that S&P's downgrade of its U.S. rating outlook to negative on Monday had come during a week of relatively thin liquidity ahead of Easter holidays in many markets and that had exacerbated moves.
Emerging European stocks <.TRXFLDEEPU> rose 0.7 percent thanks to 1 percent-plus gains in Moscow and Budapest. South African and Turkish stocks also rose more than 1 percent after falling heavily in the previous session.
But the broader index was hit by a 2 percent fall in Chinese equities <
> -- the biggest one-day loss in almost two months -- while Korean and Taiwanese markets also fell.
CURRENCIES RECOVER
On currency markets, emerging European currencies stabilised against the dollar and the euro after sliding sharply on Monday in the wake of the S&P announcement.
The Hungarian forint and the Turkish lira lost around 2 percent versus the dollar on Monday while the Polish zloty fell 2.7 percent -- its biggest one-day loss against the greenback in five months.
On Tuesday however the zloty rose 0.3 percent to the dollar and 0.4 percent to the euro <EURPLN=>.
"Given the short-term nervousness, we recommend staying away from the risky EM (emerging market) assets at present until the global risk picture stabilizes," Societe Generale told clients, noting that central European currencies, the lira, rand, Korean won and Mexican peso -- all high-beta to the dollar -- were most vulnerable.
But SG said currencies supported by tighter monetary policies would gain in the medium term.
"We remain positive on the zloty, especially against a short forint position," it said.
Hungary's central bank held interest rates steady on Monday, despite higher-than-expected March inflation. Recent Polish data has increased the possibility of a rate hike in May, although recent comments from central bankers have dampened those expectations.
Turkish markets staged a sharp rebound on Tuesday, with stocks rising 1.15 percent <
>, after dropping 2.7 percent on Monday, in what local traders said was a technical correction from oversold levels.The lira jumped 0.5 percent against the dollar <TRY=> after a 1.8 percent fall on Monday. Short-term bond yields dropped to the lowest since mid-February though the 10-year yield was at a one-month high on expectations Turkey's central bank would start to raise interest rates from the third or fourth quarter.
SG analysts said they favoured the lira "in anticipation of a tightening of monetary policy in Turkey."
Bohm of SEB said he remained underweight Turkish equities noting that earnings growth was estimated at 3-5 percent this year compared with 20 percent for emerging markets overall. The Turkish bank association said on Monday they expected profits to fall 20 percent because of stringent reserve requirement increases.
"I'm not sure the market has fully discounted the negative impact on banks' earnings from (quantitative tightening)," he said. "We could even see negative earnings growth this year so I'm hesitant to move back in fully."
On bond markets, yield spreads over U.S. Treasuries tightened 5 basis points <11EMJ> <11EML>.
Nigerian and Ivory Coast bonds continued to rise, with Nigerian paper benefiting from President Goodluck Jonathan's victory in weekend elections, though the positive sentiment was eroded by deadly riots in the opposition-dominated, majority Muslim north. (Editing by Susan Fenton)