[evan_]

You would think so, but apparently not. (Or perhaps more accurately, "maybe, but it would be politically inconvenient to investigate.") From the article:

> In May, after the revelations about the rin trading by CVR, the senators wrote to the heads of the S.E.C., the E.P.A., and the Commodities Futures Trading Commission, calling on them to investigate. But it could not have escaped the senators’ attention that two recipients of their letter—Jay Clayton and Scott Pruitt—had met with Icahn in the context of securing their jobs. The Senate Democrats cannot issue subpoenas to agencies unless they get the Republican majority to sign on—an unlikely outcome. In May, the C.F.T.C. replied to the senators’ letter: the agency would not be investigating Icahn or CVR, because rins, even though they are commodities, do not trade on a futures market, and the agency therefore had no jurisdiction to look into the matter. By this logic, the fifteen-billion-dollar market for renewable-fuel credits is not regulated by any government agency.