keywords: jpmorgan yukos auction valuation bank
text: Yukos asks JPMorgan Case for second assement ahead of auction &lt;b&gt;...&lt;/b&gt; MOSCOW : The Russian oil giant Yukos oil giant has asked US investment bank JPMorgan Chase to issue a second valuation of its top producer ahead of its expected auction by the state, the Interfax news agency quoted unnamed sources as saying.