About this chart
This chart shows months of supply for single-family detached homes on ARMLS in one ZIP code: how many months it would take to sell all the active listings (not counting UCB / CCBS) at the rate homes sold over the last month, if no new listings came on. Each point is the reading on the 1st of the month. The lower the number, the tighter the supply.
Each year has its own line, laid out by month, so you can compare this year with earlier years at the same point in the season. Pick any of 149 ZIP codes from the ZIP Code list (it opens on 85003); the last three years are ticked to start with, and you can tick any year back to 2006.
Hover over a line to see the exact figure for that month.