that market is only betting on the mandate being overturned not the entire law.
The mandate could very well be over turned and the rest of the law left intact.
True -- and then Obamacare morphs into a completely different monster. But Congress needs to fix that new "Law of Unintended Consequences" Obamacare-without-mandate before the entire health care industry (20% of GDP) collapses and becomes the next domestic automobile industry. Or they should fix it before it collapses.
Without the mandate the law is meaningless, and they know that or they wouldn’t had risked putting in the mandate in the first place.