Crude prices more than halved between June 2014 and January 2015, reflecting higher-than-expected oil and shale gas production in the US and lower demand in emerging markets coupled with OPEC's refusal to lower output.
In the December quarter alone crude prices have fell around 60 per cent.
The government and the RBI have said the lower oil prices will help the country save at least USD 50 billion this year in crude imports, which stood at over USD 150 billion last fiscal.
"As long as oil prices remain low, the direct effects will be positive on trade balances and downward on inflation in most Asian countries," Moody's senior vice-president for Asia-Pacific and Middle East Thomas Byrne said.
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"Lower inflation and import costs, in turn, will likely support growth by raising consumer purchasing power, lowering investment input costs and increasing monetary policy flexibility," Moody's senior vice president Atsi Seth said.
However, growth acceleration may be checked by lower global growth and international financial uncertainty in 2015, she added.
However, it said in Indonesia and Malaysia, lower hydrocarbon-related government revenues will erode the impact of these gains on the budget balance.
The rating agency has lowered its price assumptions for Brent crude to USD 55 per barrel through 2015 and USD 65 per barrel in 2016.
While it expects oil prices to eventually rebound as demand increases and low prices create an eventual supply response as producers reduce their capital spending, this supply response will not be meaningful until at least 2016.