* Emerging shares struggle to extend recent gains
* Shekel strongest in over 3-1/2 years post-rate hike
* Belarussian rouble allows 10 percent devaluation
By Sebastian Tong
LONDON, March 29 (Reuters) - Emerging markets struggled on Tuesday to extend recent gains but Israel's shekel rose to its strongest level in over 3-1/2 years a day after a surprise hike in its benchmark lending rate.
Belarus allowed an effective 10 percent devaluation of its rouble <BYR=> after its foreign exchange reserves fell 20 percent in the first two months of the year as the central bank battled to shore up the currency.
The benchmark equity index eked out a 0.2 percent gain by 1200 GMT while emerging sovereign debt <11EMJ> narrowed 1 basis point to trade at 259 bps over U.S. Treasuries, its tightest in three weeks.
Despite continued uncertainty over the Arab world and Japan's radiation containment efforts, investor sentiment appears to have stabilised after a selloff earlier in the year. "Problems in the rest of world -- Libya and Japan -- are still on the back-burner but they are not damaging market sentiment," said Nigel Rendell, senior emerging markets strategist at RBC Capital Markets.
"Most emerging markets have staged a reasonable rally in the last week or more. We had a big sell-off at the start of the year -- now people think that was a little bit too much."
Emerging European shares <.TRXFLDEEPU> slipped 0.6 percent, down from Monday's 9-1/2 week highs.
Czech shares <
> eased 0.4 percent, retreating from recent six-week highs, while Polish shares < > slipped 0.7 percent after reaching their highest levels in 33 months on Monday.Romanian shares <
> fell over 1 percent from the previous day's one-year peak while Russian shares < > tumbled 1.4 percent, down from recent 32-month highs.
ISRAEL SURPRISE With a few notable exceptions, most emerging currencies traded weaker.
The Turkish lira <TRY=> dipped for third straight day against the dollar while Romania's leu slid for the second successive session, down further from Friday's one-year high against the euro <EURRON=>.
Hungary's forint softened a touch after Monday's near year-high but Poland's zloty was unchanged near a three-week high against the euro <EURPLN=>.
Belarus widened the trading band of its rouble, effectively devaluing the unit by 10 percent to help it cope with a foreign trade gap widely seen to be unsustainable. [
]"A 10 percent devaluation, in effect, on its own is not really a game changer, as the sheer size of the current account deficit implies a fundamental and structural lack of competitiveness of the economy," wrote Tim Ash, head of CEEMEA Research at RBS.
"(A) more fundamental reform/restructuring of the economy ... (is) required to ensure the balance of payments becomes sustainable on a longer term basis, otherwise Belarus is likely to suffer periodic balance of payments crises over the next few years."
Meanwhile, Kenya's shilling <KES=> was up for the third day, firming 0.2 percent to its strongest against the dollar in nearly three weeks. The country's central bank surprised markets last week with an interest rate hike.
A surprise rate hike also pushed Israel's shekel <ILS=> to its highest against the dollar since October 2008.
The Bank of Israel raised its benchmark rate by half a percentage point to 3 percent, fuelling expectations that monetary policymakers will remain aggressive this year. (Additional reporting by Carolyn Cohn; Editing by Catherine Evans)