We are headed towards a level of regulation everywhere in manners that are unpredictable right now. Given the witch hunts that are just starting in Congress, I'll be surprised if elimination of derivatives is the end of changes you will see.
The Democrats want to place a .25% tax on every buy and every sell you make. Your gains just went down by .5% and your losses are now increased by .5%. (Or they will be once this bill is passed)
That all depends on what happens to real estate prices. I believe they would be better off selling them quickly. They believe that they are better off renting them out.
Though I support a line item veto, I don't think it would save tax payers a dime here. This isn't a stimulus bill. It's all about social policy. It's being called stimulus to make it politically sellable.