* Indian rupee hits over 6-month low * Investors trade cautiously in EM Asia FX * China's surprise RRR cut pressures yuan (Adds text, updates prices) By Christina Martin April 18 (Reuters) - Most emerging Asian currencies were kept in check on Wednesday, as the dollar gained on firm U.S. economic data and as U.S.-China trade risks and tensions in the Middle East appeared to take a backseat for now. China's yuan pulled back after the People's Bank of China (PBOC) surprised markets late on Tuesday by cutting reserve requirements, although the move fell short of a broad easing in monetary conditions. The dollar index against a basket of six major currencies was a shade higher at 89.538 after gaining 0.1 percent overnight. The index had stooped to 89.229, its lowest since March 27 before retreating on stronger-than-expected March U.S. housing starts and steady industrial production figures. The dollar took a small knock earlier in the week after Trump criticised the currency policies of China and Russia, before finding relief after Treasury Secretary Steve Mnuchin clarified Trump's comments on Tuesday. "It's very, very quiet today. Traders remain very cautious adding regional risk due to the overhang from the trade war," said Stephen Innes, head of trading APAC at Oanda. The Indian rupee fell as much as 0.2 percent to its lowest level since September. The Philippine peso also lost about 0.2 percent and was on track to mark its third consecutive session of declines. The Indonesian rupiah, the Malaysian ringgit, and China's yuan were all little changed. The Korean won tacked on 0.1 percent to a one-week high, while the Singapore dollar, the Taiwan dollar and the Thai baht also crept up slightly. "The won is up on the peace treaty and the high level political discussions this has triggered. This will ultimately be good for regional FX, but in the meantime traders remain extremely cautious adding regional rush dye to the overhang from trade wars," said Innes. South Korea said on Wednesday it is considering how to change a decades-old armistice with North Korea into a peace agreement, as U.S. officials confirmed an unprecedented top-level meeting with the North Korean leader. CHINA'S YUAN The Chinese yuan slipped against the U.S. dollar on Wednesday, after the central bank surprised markets by cutting the amount of reserves banks must keep on reserve, raising some concerns over the health of the economy. The move late Tuesday by the People's Bank of China came hours after data showed the world's second-biggest grew at a slightly faster-than-expected pace of 6.8 percent in the first quarter, buoyed by strong consumer demand and robust property investment. Traders said the sudden RRR cut weighed on the yuan in morning trade as the amount was larger than expected and had come earlier than most had predicted. Oanda's Innes also suspects the market is of the view that China's GDP data "could be a high point of the year", noting risks from the tariff row with the United States and Beijing's extended deleveraging campaign. "In other words Q2 GDP could be worse than expected." Indeed, analysts are still predicting China's economic growth will slow to 6.5 percent this year, with the ongoing regulatory crackdown and U.S. trade dispute seen as key risks, a Reuters poll showed. The following table shows rates for Asian currencies against the dollar at 0530 GMT. CURRENCIES VS U.S. DOLLAR Change on the day at 0530 GMT Currency Latest bid Previous day Pct Move Japan yen 107.350 106.99 -0.34 Sing dlr 1.311 1.3113 +0.05 Taiwan dlr 29.354 29.362 +0.03 Korean won 1067.400 1067 -0.04 Baht 31.220 31.23 +0.03 Peso 52.099 52.05 -0.09 Rupiah 13767.000 13765 -0.01 Rupee 65.665 65.64 -0.03 Ringgit 3.890 3.8885 -0.04 Yuan 6.287 6.2855 -0.03 Change so far in 2018 Currency Latest bid End 2017 Pct Move Japan yen 107.350 112.67 +4.96 Sing dlr 1.311 1.3373 +2.04 Taiwan dlr 29.354 29.848 +1.68 Korean won 1067.400 1070.50 +0.29 Baht 31.220 32.58 +4.36 Peso 52.099 49.93 -4.16 Rupiah 13767.000 13565 -1.47 Rupee 65.665 63.87 -2.73 Ringgit 3.890 4.0440 +3.96 Yuan 6.287 6.5069 +3.49 (Reporting By Christina Martin in Bengaluru; Additional reporting by Nicole Pinto)