Jeffrey C. Sprecher
Analyst
Yes, absolutely. I think there is a paradigm shift. I think the United States is going to become a gas -- a natural gas-oriented energy economy. And while prices will be low, because we have an abundance of gas, on a percentage basis, a $0.10 or $0.20 move is a large move. And as people become more dependent on natural gas, they will want to hedge out their risks. What we see going on right now is, as mentioned, natural gas used to -- in this country, used to be largely a south to north movement, and now it's an east to west movement. And so the relationships that people had on how they hedge their risk versus the benchmark contract that we offer are changing and some of those relationships are unknown because of the logistical challenges of moving this gas around are great. And in talking to some very senior people in the industry, they're starting to get a handle on how the markets will work in times of low volatility and high volatility, and as I think they become more adept at that, you'll see the larger dealers more proactively offering to hedge their customers' business because they can understand the risk. So I'm long term bullish on it and I think, in other words, you want to be in the U.S. natural gas business as the U.S. is becoming a natural gas economy. And if you look at the numbers, Ken, in September, October, we were seeing a decent reacceleration in nat gas and people kind of took November and December off. But January got us right back around those same levels. So even in the near term, we did see some tick-up in the fall and in January, it's an encouraging start. Down against a really difficult compare, but an encouraging start relative to the last half year.
Kenneth B. Worthington - JP Morgan Chase & Co, Research Division: Awesome. Okay. Thank you. And then on emissions, I'd love to hear outlook, you had some stuff in the prepared remarks, we're in Phase III, volumes zoomed in 4Q, prices are really low. So what are the political and regulatory themes that drive activity maybe in '13. And then pricing has dropped so much, it feels like it's going to cost as much to trade one of these contracts as the cost of the contract itself. So does pricing need to change here given the decline in the value of the contract itself?