Pretty sure you can take a short position on igas at 140.5 and be buying DTE at 18c and have an almost gauranteed return.
Buying dte at 18c is equivalent to buying igas at 123, so likely plenty of people wanting into igas at a discount.
I think we'll close at 18.5c today. Then its over to watch igas tonight. The prices are now tightly coupled due to the deal.