The Rupee opened weaker on Monday after a rally fuelled by an aggressive forex intervention by the Reserve Bank of India last week, with traders now reassessing how much follow-through the central bank is willing to deliver. Late in Friday's session, heavy dollar sales by the RBI powered the rally, with bankers saying the intervention was aimed at speculators and decisively pushing the currency higher. The rupee climbed from the 90.10–90.20 range to near 89.30 within minutes, triggering stop-losses and forcing a rapid repositioning. Bankers said the late-session timing amplified the move, leaving little room for counter-flows. A similar playbook was used on Wednesday, though that intervention came soon after the market opened. The rupee climbed 1.3% last week, its best showing since June, lifting it marginally into positive territory month-to-date. Meanwhile, Asian cues offered little directional cues for the rupee at the beginning of the week. Most regional currencies were largely flat, while the dollar index was marginally weaker. Asian cues have played a limited role in the rupee's recent intraday moves, bankers say, with domestic flows and RBI intervention the dominant drivers. The yen languished near record lows to the euro and Swiss franc on Monday as the lack of hawkish signals from the BOJ emboldened traders, even as Japanese officials stepped up warnings about currency intervention. The Japanese currency also loitered near an 11-month trough against the U.S. dollar and was just shy of a 17-month low on the Aussie. On Friday, the central bank raised the policy rate by a quarter point to a three-decade peak of 0.75%, in a clearly telegraphed move. But while the accompanying statement signalled a readiness to continue tightening policy, BOJ Governor Kazuo Ueda stuck to his usual cautious rhetoric in his news conference. The lack of any hawkish hints sent the yen tumbling 1.3% versus the euro, 1.4% against the greenback and 1.5% against the Aussie, even as it triggered a broad selloff in Japanese government bonds that sent the 10-year yield - which moves inversely to the price - soaring past the symbolic 2% mark to the highest since 1999. A decisive break above 158 yen per U.S. dollar would open the way to the high for the year from January at around 158.87, he said. The U.S. dollar edged down 0.2% to 157.43 yen on Monday, but remained close to last month's high of 157.90. The euro eased 0.1% to 184.43 yen , staying within touching distance of Friday's record peak at 184.75. The single currency was flat at $1.1714 . The Swiss franc eased slightly by 0.1% to 198.04 yen , but not before touching a record 198.31 yen early in the session. The Aussie weakened a touch to 104.22 yen , but was not far from the 104.39 yen mark reached earlier this month for the first time since July of last year. Oil prices gained on Monday in early Asian trading hours after the U.S. intercepted an oil tanker off the coast of Venezuela in international waters. U.S. West Texas Intermediate crude was up 34 cents, or 0.6%, at $56.86 per barrel as of GMT 2323.......