Here is the rule from the IRS regarding length of stay for short term rentals:As defined by Treasury Regulation Sec. 1.469-1T(e)(3)(ii)(A)The average period of customer use is 7 days or lessThe average period of customer use is 30 days or less.

They made their millions, and while they don't want the gravy train cut off, they also are looking at their personal bank account and thinking: I can put my cash in treasuries and still make $1mm/yr, so 'F' it.B) What is this "long time in business"?  

As you mention, this has been priced into the markets for some time, and the reality is those who buy MBS's and invest in mortgages compete against the 10 year treasury bill.

The treasury yields are actually moving up since they announced the cut.

It is analogous to owning a 30 yr treasury bond at well above current rates.

The program primarily targets corporations and limited liability companies (LLC).Take This Action NOW:To learn more,US Treasury dept, “Financial Crimes Enforcement Network”Disclosure: Janet I.

You probably need to report if you are a corporation, LLC, or HOA.For more information:US Treasury dept, “Financial Crimes Enforcement Network”Disclosure: Janet I.

So the Treasury Regulations to the Tax Code define situations in which property "rentals" are not considered real estate income.  

Take This Action NOW:To learn more,US Treasury dept, “Financial Crimes Enforcement Network” Disclosure: Janet I.

Treasury notes increasing have already erased the very short-lived drop in rates and now they are even higher than before the FED cut.