The housing inventory crisis is keeping older millennials stuck with their parents

In 2017, the share of millennials ages 18 to 24 living with their parents fell to a six-year low.
But older millennials, ages 25 to 34, are moving out of home at a slower rate. 
That's likely because more people in this group would rather buy than rent, but are increasingly unable to find affordable houses on sale. 
US home prices are rising at double the annual rate of appreciation in a "normal" market, according to Zillow. 
 
There's an important split, defined by age grou