Waiting for the right moment to cut interest rates, India's central bank faces a problem over public perceptions that price rises will return to double-digits even though forecasts show retail inflation fell to a record low of 4.5 percent last month.
Explaining why he left the policy rate at 8.0 percent, despite inflation's steep fall from over 11 percent in November last year, Reserve Bank of India Governor Raghuram Rajan said last week that he wanted to be sure inflation and inflationary expectations are really waning.
He also wants to see Prime Minister Narendra Modi's seven-month-old government reduce the fiscal deficit. If the signs are good, the RBI could reduce rates early next year, the central bank said in its policy review statement on Dec. 2.
Aside from looking at the strength of on-going deflationary impulses, the RBI is listening to people like Siddhi Mindalkar, a 34-year-old Mumbai housewife, taking into account their views on how prices will behave to determine the best time to cut.
"I am spending about 20 percent less on fruit and vegetables now than six months ago, but prices will probably rise again once the summer comes," said Mindalkar as she shopped for vegetables at a roadside stall.
Food prices, which have the biggest weighting in the consumer price index, typically rise as the summer heat cranks up in March, and thereafter largely depend on how kind the monsoon rains are to farmers.
The RBI expects inflation in 2015 to hover around 6 percent - its target for January 2016 - and sees risks to the target evenly balanced.
Retail price inflation data is due to be released on Friday. A Reuters poll of analysts forecast that inflation rose 4.5 percent from a year ago in November, down from 5.5 percent in October and the lowest since the data series was introduced in 2012.
The RBI will release its next quarterly survey of inflation expectations at the end of this month. What matters most, according to Rajan, is not what people think inflation will be, but how much their views are changing. Last week, the RBI said expectations for inflation were falling.
The last survey in September showed more than 70 percent of households had expected consumer inflation at double digits in the three months and year-ahead periods.
CAREFUL SPENDERS
"While inflation expectations have started easing, the pace of easing is very slow," said Rupa Rege Nitsure, chief economist for Bank of Baroda in Mumbai.
Cutting rates when inflation expectations remain too high could make them far less effective in terms of boosting consumer demand - vital for an economy growing at around 5 percent, well below the 8 percent needed for full employment.
Top Indian consumer companies such as Hindustan Unilever Ltd (HLL.NS) remain cautious about demand.
"Inflation has been pretty high in the past few quarters which certainly has had an impact since consumers are being very careful in terms of spending," said Lalit Malik, chief financial officer of Dabur Ltd (DABU.NS), which produces personal and health care products.
Changing perceptions of inflation risks is difficult in a country where food prices are so unpredictable. The situation is exacerbated by India's structural problems, with bad roads, poor storage facilities leading to high wastage.
Food prices have wrong-footed other central bankers. Duvvuri Subbarao, Rajan's predecessor, cut rates by 75 basis points in the first three months of 2013 expecting inflation to ease.
Instead, he got surging onion prices after a bad crop, sparking a loss of consumer confidence that contributed to the previous Congress government's defeat in elections last May.
Tukaram Malusure has been selling vegetables for the past five decades.
"There is no fixed pattern," the 70-year-old stallholder shrugged. The only certainty, he says, is that "prices go up after the Holi festival" in March.
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