Sector: Energy

GENEVA (Reuters) - China filed a complaint at the World Trade Organization (WTO) on Friday to challenge U.S. tariffs charged on Chinese goods that the United States considers to be unfairly subsidized.

MADRID (Reuters) - Shares in Spain's fourth-biggest lender Bankia SA <BKIA.MC> were suspended on the Madrid stock exchange on Friday, ahead of an evening announcement when the bank is expected to ask the state for a rescue of more than 15 billion euros ($19 billion).

Brent crude futures held steady at $106 a barrel on Friday, but was on track for a fourth weekly loss and the longest losing streak since early 2010, as investors were jittery over signs of slowing global economic growth blunting oil demand.

WASHINGTON (Reuters) - Frustrated by the gridlock that has stalled Congress leading into the 2012 presidential elections in November, the top Republican on the Senate Energy Committee is drafting what she hopes is a fresh look at the big-picture energy policy.

(Reuters) - BlackRock Inc's <BLK.N> Global Resources team increased its Chesapeake Energy Corp <CHK.N> stake to 4 million shares from fewer than 1 million shares, a source familiar with the situation said on Thursday.

Shares of some top oil companies were up at the close of trading:

Fitch Ratings lowered its rating outlook on Seacor Holdings Inc., a provider of offshore-drilling services, to "negative" from "stable" on Thursday.

(Reuters) - BlackRock's <BLK.N> Global Resources team increased its Chesapeake Energy Corp <CHK.N> stake to 4 million shares from under 1 million shares, a source familiar with the situation said on Thursday.

NEW YORK (Reuters) - Billionaire hedge fund manager Carl Icahn has purchased a stake in Chesapeake Energy Corp <CHK.N>, according to Bloomberg, which sourced the information to a person with knowledge of the matter.

Chesapeake Energy shares soared late in trading Thursday on revelations that Carl Icahn and BlackRock have been on a buying spree.

(Reuters) - Gevo Inc started production at a converted ethanol plant in Minnesota, bringing on line the world's first commercial-scale facility to make advanced biofuels and renewable chemicals. Shares rose more than 9 percent.

HOUSTON/NEW YORK (Reuters) - Chesapeake Energy Corp has put a half-million acres in Wyoming and Colorado up for sale, as the second-largest U.S. natural gas producer scrambles to raise cash to close a $9 billion to $10 billion funding shortfall.

NEW YORK (Reuters) - Citadel Securities' market-making business lost around $30 million due to Facebook Inc's botched initial public offering on Nasdaq OMX Group Inc's U.S. stock exchange, a source with knowledge of the situation said.

HOUSTON/NEW YORK (Reuters) - Chesapeake Energy Corp has put 504,000 acres in the DJ Basin in Wyoming and Colorado up for sale, as the U.S. energy company scrambles to raise cash to close a $9 billion to $10 billion funding shortfall.

HOUSTON/NEW YORK (Reuters) - Chesapeake Energy Corp has put 504,000 acres in the DJ Basin in Wyoming and Colorado up for sale, as the U.S. energy company scrambles to raise cash to close a $9 billion to $10 billion funding shortfall.