6. 4. OPEC’s Next Move.OPEC deserves a lot of credit (or blame) for the remarkable downturn in oil prices last year.While many pundits have declared OPEC irrelevant after their decision to leave output unchanged, the mere fact that oil prices crashed after the cartel’s November meeting demonstrates just how influential they are over price swings. For now OPEC – or, more accurately, Saudi Arabia – has stood firm in its insistence not to cut production quotas. Whether that remains true through 2015 is up in the air.