WTI crude held above $87 per barrel, hovering at the highest levels over nine months, after Saudi Arabia on Tuesday extended its 1-million-barrels-per-day voluntary oil production cut until the end of the year, according to the state-owned Saudi Press Agency. Russian Deputy Prime Minister Alexander Novak also said on Thursday that Russia agreed with its OPEC partners on the parameters for continued export cuts. Signs that the US economy may be cooling also s...