(Bloomberg) -- The world’s lithium miners — facing an unprecedented demand surge and wild price swings — are shaking up the way the commodity is bought and sold.Most Read from BloombergIran State TV Says ‘No Sign of Life’ at Helicopter Crash SiteSpeedier Wall Street Trades Are Putting Global Finance On EdgeChina’s Housing Rescue Too Small to End Crisis, Analysts SayEven If Alito Is Right, the Upside-Down Flag Was WrongRescuers Found No Signs of Life at Iran Crash Site: Full StoryAs lithium emerg