Despite the fact that both are monthly SAAR series (seasonally adjusted annualized rate), they are exceptionally volatile and subject to extensive revisions. Thus it is unwise to assign much credibility to a single month.
Over the long haul, however, the two offer a compelling study of trends in residential real estate, especially when we adjust the Permits and Starts for population growth. Here is an overlay of the two series since the 1959 inception of the Starts data and the 1960 inception of the Permits data. The monthly data points are preserved as faint dots. The trends are illustrated with 6-month moving averages of data divided by the Census Bureau’s mid-month population estimates.
Here is a closer look at the overlay since 1990.