Instead of buying at a set pace, the BOJ said it would buy ETFs only when necessary while maintaining a 12-trillion-yen ceiling for annual purchases.
"We judged that it was necessary to maintain monetary easing at a sustainable form to achieve our 2% inflation target," the BOJ said in a statement announcing the outcome of its review.
As widely expected, the BOJ kept intact its target of -0.1% for short-term rates and 0% for the 10-year bond yield under its yield curve control (YCC) policy.
In a review of its policy tools announced on Friday, the BOJ said it would allow long-term rates to move up and down by 0.25% around its target, instead of by 0.2%.
The BOJ will not apply the rule rigidly when yields move below the band temporarily, it said, stressing the near-term priority was to keep borrowing costs stably low to support an economy hit by the COVID-19 pandemic.
"It's a very minor change. The difference between 0.25% and 0.2% is quite small," said Masaaki Kanno, chief economist at Sony Financial Holdings in Tokyo. "There's a long way to go before we even get close to 2% inflation," he added.
In December, the BOJ unveiled a plan to conduct a review of its tools in March to make them more "sustainable and effective" as the COVID-19 pandemic prolongs its battle to spur growth and inflation with massive monetary support.
Nodding to calls its huge buying was distorting prices, the BOJ said it will buy ETFs only when markets destabilise and confine buying to those linked to TOPIX. At present, it targets both ETFs linked to TOPIX and the Nikkei stock average.
The decision sent the Nikkei average down 1.6% and the Topix to a new 30-year high. The benchmark 10-year Japanese government bond (JGB) yield rose 1.5 basis points to 0.115% after the announcement.
The BOJ said it will also offer incentives for financial institutions that tap its loan programmes, as part of efforts to mitigate the side-effects of additional interest rate cuts.
Specifically, the BOJ will pay interest to financial institutions that borrow from its various lending schemes.
"In practical terms, there is not much for the Japanese economy in these policy tweaks," said Joseph Capurso, currency analyst at Commonwealth Bank of Australia.
"One thing that the central bank did do is they made some tweaks to their various bank lending facilities. But these are just tweaks and I don't think that they're going to change the trajectory of the Japanese economy."
The BOJ had already been "stealth" tapering risky asset purchases by sharply reducing buying after ramping it up last year to calm markets jolted by the pandemic.
The challenge for the BOJ would be to convince markets that by making its policy framework sustainable, it can eventually push up inflation to its elusive 2% target.
Japan's core consumer prices fell 0.4% in February from a year earlier, data showed on Friday, dropping at a slower pace than in January but remaining distant from the BOJ's goal.
($1 = 108.9000 yen)
(Reporting by Leika Kihara and Tetsushi Kajimoto; Additional reporting by Kaori Kaneko and Daniel Leussink; Editing by Shri Navaratnam and Sam Holmes)
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)
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