GRAINS-Soybeans rise, set for longest winning streak in 6 years

* Soybeans set for 9-day gaining run, longest since early 2012

* Market at highest since early Dec on dry Argentine weather

(Adds details, quotes) SINGAPORE, Jan 25 (Reuters) - Chicago soybeans rose for a ninth consecutive session on Thursday, the longest unbroken gaining run in nearly six years, as dry weather in Argentina hit crop yields and a weaker U.S. dollar made greenback-priced commodities cheaper. Wheat climbed to a two-week high, while corn was little changed after rising 1.5 percent in the last session. The most-active soybean contract on the Chicago Board Of Trade rose 0.3 percent to $9.95 a bushel by 0334 GMT, the highest since Dec. 8. Soybeans last rose for at least nine straight sessions in March 2012. Wheat added 0.4 percent to $4.34-3/4 a bushel, having closed up 2.7 percent on Wednesday, while corn was unchanged at $3.56-1/2 a bushel. "We have seen a big run-up in soybean prices as there have been weather concerns in Argentina," said Phin Ziebell, agribusiness economist at National Australia Bank. "But the rally could be running out of steam as there is no major supply risk with ample supplies in the United States and Brazil." Soybeans were supported by concerns about drought in parts of Argentina, the world's third-largest soybean producer and largest exporter of soymeal and soyoil. Dryness there has fuelled forecasts of lost plantings and yield damage that could potentially tighten global supplies and make U.S. exports look more attractive. Still, the United States has ample supplies from last year's bumper harvest, while Brazil is on track for another record crop. Grains complex had been underpinned by a weaker dollar, increasing the competitiveness of U.S. supplies. The dollar skidded to a three-year-low against its peers on Thursday after caving on comments by U.S. Treasury secretary Steven Mnuchin that he welcomed a weaker currency, while the euro was firm ahead of the European Central Bank's policy decision. Commodity funds were net buyers of Chicago Board of Trade corn, wheat and soybean futures contracts on Wednesday, traders said.

Grains prices at 0334 GMT

Contract Last Change Pct chg Two-day chg MA 30 RSI CBOT wheat 434.75 1.75 +0.40% +3.14% 425.58 64 CBOT corn 356.50 0.00 +0.00% +1.49% 350.64 70 CBOT soy 995.00 2.75 +0.28% +0.89% 971.26 79 CBOT rice 12.12 -$0.04 -0.37% -0.66% $12.01 64 WTI crude 66.19 $0.58 +0.88% +2.67% $61.14 84


Euro/dlr $1.244 $0.003 +0.25% +1.14% USD/AUD 0.8098 0.004 +0.46% +1.28%

Most active contracts Wheat, corn and soy US cents/bushel. Rice: USD per hundredweight RSI 14, exponential

(Reporting by Naveen Thukral; Editing by Amrutha Gayathri)