EghtesadOnline: After two tough years of falling oil prices and company valuations, investors in the world’s biggest energy producers have some cause for hope as crude prices continue their recovery from a 12-year low. They will be looking to OPEC not to dash it.

EghtesadOnline: Oil investors ’ bullish bets on last week’s OPEC meeting paid off. While most analysts weren’t expecting a deal, money managers increased wagers on rising prices by the most since January ahead of the Organization of Petroleum Exporting Countries’ talks in Algiers.

EghtesadOnline: Oil investors are already worrying over the potential fallout when OPEC’s deal to cut output expires, marring emerging signs that the accord to shrink a glut is finally succeeding.

EghtesadOnline: Investors are betting big that OPEC’s cuts are real. Money managers are the most bullish ever on West Texas Intermediate crude for a second week as signs show OPEC and other nations are slashing production.

EghtesadOnline: OPEC’s production cuts have already turned oil speculators the most bullish in a decade. As their effect is felt, crude could become even more alluring.

EghtesadOnline: OPEC appears to have persuaded investors that it’s making good on promised production cuts.

EghtesadOnline: Oil investors seem to have less reason to doubt that OPEC and other producers will make the cuts needed to balance the market.

EghtesadOnline: Investors are the most optimistic on oil since the slump began two and a half years ago. Money managers boosted bets on rising West Texas Intermediate crude prices to the highest level since July 2014 after the Organization of Petroleum Exporting Countries and producers outside the group agreed to coordinate crude production cuts

EghtesadOnline: Oil investors turned bearish at the fastest pace in more than a year as they lost confidence that OPEC will reach a deal with other producers to limit supply at a gathering this week in Algiers.