Commodity Pool Operator - CPO
  
It sounds like a lifeguard. But lifeguards would more likely protect your money than speculate with it...much the same way that hedge fund managers do.
A commodity pool operator is the person or fund that receives capital from different investors so they can trade in the futures and commodity markets. The purpose of the commodity pool is to combine monies so that they can be used to increase leverage in the futures markets, and potentially earn more money.
This category of traders can include hedge funds, and is regulated by the CFTC and the National Futures Association. Though commodity trading’s first regulations date back to the early 1920s, it took the passage of the Commodity Futures Trading Commission Act to officially recognize commodity pool operators as...a thing people can do.