We have a few delistings and halts going on today. First, despite the bad news for HD-DVD that surfaced last week, there were more titles available on HD-DVD than Blu-Ray at the year's end. And so our HDVSBLU prop pays out at $100. The market missed out on this one: trading was halted at $47.25 per share.

Excuse the interruption of CES coverage, but we've at long last closed the GOOGL proposition. As traders can see from the chart above, Yahoo.com's

Today on PPX we have halted not one, not two, no, not even three, but FOUR propositions—all of them paying out at POP$0. No surprises here—all of the stocks in question had been trading below $10 for several weeks.

In summary, Digg.com was not shut down, no NASA bigwigs were fired, the iPhone was not recalled, and Facebook.com did not go public:

DIGGRIP: halted at POP$0.50

PNKSLP: halted at POP$2.50

FACEBOOK: halted at POP$5.25

IPRECAL: halted at POP$0.25

As always, happy trading! —John Mahoney

Commissions are now live. To recap, from now on PPX will charge a flat POP$0.25 per share on every trade. The charge will be deducted from the users cash balance. Happy trading.—The PPX Staff

After carefully weighing the pros and cons of the PPX trading commission, we have determined, for the foreseeable future, that we will not reinstate it. Some pundits believe that commissions discourage market manipulation, but there is also evidence that markets are self-correcting, and PopSci believes that this will be true in the case of PPX. We took user feedback into consideration when making this decision, and we agree that eliminating the commission will allow for a more fluid market and a more fun game, overall. Happy trading. —The PopSci Editors