If you take a look at the super popular markets recently, they are all short-term markets such as the weekly Obama approval markets (awesome, please keep doing these!), and the DHS shutdown markets. If you could have around 4 of these running at any one time it would be absolutely fantastic.
I think this would get more people interested, improve the accuracy of short term predictions that are in the news, and are a better niche for prediction markets than topics like presidential elections which can also be well predicted by polls.
I'm not sure of the details of the no-action letter, but the press surrounding it mentions economic indicators. A weekly Obama approval poll, a weekly economic indicator, and one or two current events topics that are weekly would be a great start.
Thanks for taking the time to improve the site. Please let me know if you need help on coming up with specific market suggestions.
Definitely agree more shot term questions. Daily, weekly, monthly, etc.