* Lower rates weigh on exchange rate; rupee at record low
    * Central bank cut key rates to record low in April
    * Policy decision due Wednesday, Dec. 30 at 1400 GMT

    By Shihar Aneez
    COLOMBO, Dec 29 (Reuters) - Sri Lanka's central bank is
expected to raise interest rates by 25 basis points from record
lows at its policy meeting on Wednesday, a Reuters poll found, a
move that could relieve pressure on the fragile rupee.
    The rupee closed at a record low of 143.95/144.05
per dollar on Tuesday, hit by dollar demand from importers. 
    Six out of 11 economists surveyed expected the Central Bank
of Sri Lanka to raise the standing deposit facility rate (SDFR)
and the standing lending facility rate (SLFR) by 25 basis points
to 6.25 percent and 7.75 percent, respectively.
    It will be the first increase since February 2012, should
the central bank raise rates on Wednesday. 
    All 11 economists predicted the statutory reserve ratio
(SRR) for commercial banks would remain unchanged at 6.00
    Four economists expected the rates to be left steady, while
one expected the central bank to raise SDFR and SLFR by 50 basis
points (bps) each.
    "If they want to maintain the currency, they will have to
raise the policy rates," said Danushka Samarasinghe, research
head at Softlogic Stockbrokers.
    Sri Lanka has to raise rates to guard against outflows from
the pressure of higher U.S. rates and cooling economic growth. 
    Economists said the government had little fiscal options to
help keep the currency stable as it had promised a lot of
spending in the 2016 budget. 
    Sri Lanka early this month passed its 2016 budget with a
series of amendments due to public protests that could derail
the government's attempts at fiscal consolidation. 
    The central bank in April surprised markets with a 50-bp cut
to spur economic growth and boost consumer prices. Until then,
it had held rates steady for 14 months. 
    Since then the island nation has witnessed a 22.2 percent
growth in private sector credit in September from a year
earlier, compared with 13.9 percent growth in March this year. 
    The central bank floated the currency on Sept. 3 after
heavily defending it. Since then the currency has fallen 6.4
percent and economists say lack of monetary and fiscal policy
tightening led to the steep fall, apart from the strong dollar.
    The International Monetary Fund in September said that the
key policy rates were not "necessarily inappropriate".
    Sri Lanka's economy grew 4.8 percent in the third quarter of
this year compared with the same period a year earlier, slowing
from 6 percent in the second quarter. 
    Finance Minister Ravi Karunanayake during his 2016 budget
speech last month estimated the economy would expand 6 percent
this year and aimed to achieve annual growth of 7-8 percent
during the next few years. 
    Following are poll forecasts for rates on Wednesday: 
                    SDFR         SLFR        SRR
                  (in pct)    (in pct)     (in pct)    
Median              6.25         7.75       6.00
Average             6.18         7.66       6.00  
Minimum             6.00         7.50       6.00
Maximum             6.50         8.00       6.00   
Rates in November   6.00         7.50       6.00
No. of economists    11           11         11

 (Editing by Jacqueline Wong)