Ruing that his work on containing inflation and cleaning up books of the banks was "yet to be completed", Rajan said, "While I was open to seeing these developments through, on due reflection, and after consultation with the government, I want to share with you that I will be returning to academia when my term as Governor ends on September 4, 2016."
Speculation has been rife over whether Rajan, former IMF Chief Economist known to have predicted the 2008 global financial crisis, would get a second term after BJP leader Subramanian Swamy launched a no-holds barred attack on him recently accusing him of destroying economy with his hawkish stance on interest rates.
53-year-old Rajan, who took charge as RBI Governor in September 2013 with a three-year term, had also ruffled feathers in the saffron camp with his outspoken views on issues like intolerance and his remarks about India being 'one-eyed king in the land of blind'.
While Finance Minister Arun Jaitley called for restraint in public criticism in the wake of Swamy's attacks, BJP President Amit Shah said the newly-nominated MP's remarks were his personal opinion.
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Answering questions on another term for Rajan, Prime Minister Narendra Modi had said that this "administrative subject" should not be an issue of interest to the media and it "will come up only in September".
Decision of Rajan, who was called a rockstar central banker, immediately set off speculation about his successor and the impact it could have on stock and bond markets when they open on Monday morning.
Jaitley, who had earlier steadfastly refused to discuss in public the issue of a second term for Rajan, welcomed his decision saying he respects it and said the government appreciates his good work.
Former Finance Minister P Chidambaram, during whose term
"I am disappointed and profoundly saddened by the decision of Dr Raghuram Rajan to leave the RBI on completion of his term on September 4, 2016, but I hasten to add that I am not surprised at all," he said in his reaction.
The senior Congress leader said the government had invited this development through a craftily-planned campaign of insinuations, baseless allegations and puerile attacks on a distinguished academic and economist.
"As I had said sometime ago, this government did not deserve Dr Rajan. Nevertheless, India is the loser," he added.
Surprisingly, there were no comments from industry chambers like CII and FICCI.
There have been concerns that Rajan's exit, which has been termed as 'Rexit', could lead to adverse impact on the country's financial markets.
While the Governor did not specifically refer to this, he said in his letter that the RBI would be able to "ride out imminent sources of market volatility like the threat of Brexit."
Rajan has been generally hailed by the industry and experts, but has been under attack from some, including Swamy and a few other leaders for what they call his failure to contain inflation and lower interest rates to boost economy.
The Governor said he is confident that his successor would take the RBI to new heights.
"While all of what we laid out on that first day is done, two subsequent developments are yet to be completed. Inflation is in the target zone, but the monetary policy committee that will set policy has yet to be formed.
"Colleagues, we have worked with the government over the
An outspoken Rajan has ruffled many feathers with his candid views on various issues, including the tolerance debate and his 'one eyed king among blinds' remark.
In his message, Rajan reflected on his three years at the helm of the central bank, tracing the journey from taking over the governorship in 2013 under difficult circumstances when the country was in "Fragile Five" with high inflation and intense pressure on the rupee.
"At that time, the currency was plunging daily, inflation was high, and growth was weak. India was then deemed one of the 'Fragile Five'," he said and quoted from his opening statement which spoke of opening a special deposit window from the diaspora to tide over the crisis.
Rajan also mentioned the other measures he had spoken about, including inflation-targeting, introducing new kind of banks and taking universal ones on-tap and addressing the asset quality stress through a data base.
"Today, I feel proud that we at the Reserve Bank have delivered on all these proposals," said Rajan, who had also served as the Chief Economic Advisor under the UPA regime under the then Finance Minister P Chidambaram before taking over as the RBI chief. Besides, he also headed a committee on financial sector reforms.
His predecessors -- D Subbarao (2008-13), YV Reddy (2003-08), Bimal Jalan (1997-2003) and C Rangarajan (1992-97) - all had five-year (three plus two) terms or more.
Rajan, who became the 23rd Governor on September 4, 2013, pointed out that the work on operationalising the monetary policy committee (MPC) which will take the inflation-targeting framework ahead, and the clean-up of bank balance-sheets as unfinished agenda.
Pointing out to the over USD 360 billion forex kitty,
Rajan said it is a record high and reiterated confidence of comfortably weathering the NRI deposit repayments due soon without any hitches.
Like for any other RBI Governor, the most contentious point in the relationship with the Finance Ministry was the rate setting strategy and by raising rates, he behaved contrary to the North Block wishes.
Rajan, however, tried hard to convince that they wanted to help establish a credibility to RBI's ability to reign-in inflation and once he was confident of the shift in the trajectory, started lowering the rates.
In the letter, Rajan, who was dubbed a rock star by the media and was the darling of foreign economists and analysts, said the RBI has cut the key rates by 1.50 per cent since taking the accommodative stance in January 2015.
He also counted helping government create the Bank Board Bureau, creating a whole set of new structures to allow banks to recover payments from failing projects, and forcing timely bank recognition of their unacknowledged bad debts and provisioning under the Asset Quality Review (AQR) as other achievements.
Rajan said the enabling framework for National Payments Corporation of India to roll out the Universal Payment Interface will soon "revolutionise mobile to mobile payments" in the country.
Rajan, who introduced a slew of measures on the liquidity front, also counted the issue of 40-year government bond as an achievement.
The letter did not mention much on change in RBI's functioning but said, "the RBI has gone through a restructuring and streamlining, designed and driven by our own senior staff."
"The integrity and capability of our people, and the transparency of our actions, is unparallelled, and I am proud to be a part of such a fine organisation... It has been a fantastic journey together!"
Foreign fund managers like Marc Faber and Jim Rogers were public in describing Rajan as one of the best central bankers across the world, while a number of industry leaders back home including N R Narayana Murthy have been pitching for a second term for him.
"One of the advantages that India has other than having the lot of smarter people is that Rajan is probably the best central banker in the world, or at least the least bad central banker in the world," Jim Rogers of Rogers Holdings recently said.