Northwest Multiple Listing Service runs a blog where they display weekly statistics on Supra lockbox activity. For those of you who don’t already know, a Supra lockbox is one type of device placed on [usually vacant] houses which are listed for sale. It holds the keys for the house. An authorized real estate agent can open the lockbox and remove the keys in order to show the house to a prospective buyer.
While the results can’t necessarily be relied upon in all circumstances, it is reasonable to suppose that Supra lockbox statistics may provide a leading indicator of new home sales.