RUSAL Rusal has made an upfront payment of $13 million for a stake in alumina producer HWNM. Company is buying 30% of China's HWNM for CN¥1.911 bln, or about $267 mln, but the amount may be adjusted depending on the size of HWNM's working capital and debt at closing. In any case, the price is not expected to exceed CN¥2.5 billion, or about $349.2 million. Closing...