The deal will make Pretium the second largest owner and operator of single-family rental housing in the US.

While the move may not mean bankruptcy is imminent, it is another threat to malls.

Converting these malls to fulfillment centers, apartment complexes, schools or medical offices could reduce their property values anywhere from 60% to 90%.

Office market activity varies from market to market, but high-value assets seem to be performing well in several metros.