Burning SPS for DEC caps off the value of DEC at $1/975. Anyone who pays more than $1 for 975 DEC is just wasting their own money because they could have just as easily spent that $1 on SPS and burned it for 975 dec. If there's no reason to buy it above that price, how would the price move up above it?
I think DEC can still drop below by a little bit but because DEC will be so scarce, anything below peg should be looked at as a deal and be snapped up by anyone who regularly burns SPS to get their DEC.