Speculation and volatility in the price of carbon. we actually not only limit trading, but we also have what is known as a price collar to avoid the volatility in prices so that businesses can plan, invest, and create you? jobs. >> senator collins, you've been swimming against the tide as a moderate republican in maine, despite stupid things that southerners like me say from time to time that make new englanders go what the hell? why is she still a republican? does joe barton speak for the republican party? should they not bump that guy from being the ranking member of the energy, ins since he...