The surprising weakness in June housing starts is probably only temporary, according to Morgan Stanley economist Ted Wieseman, but the softness in June nonetheless prompted him to cut Morgan Stanley’s Q2 GDP estimate to 0.3 percent from 0.4 percent.

After a 9.4 percent pullback from the February cycle high, single-family starts are now running far below the pace of new home sales. Unless sales roll over — which was certainly not the message from the surging homebuilders’ survey — supply of unsold new homes will fall to record lows in coming months, likely spurring a sharp renewed pickup in new home construction.

Incorporating the June softness, however, Morgan Stanley cuts its forecast for Q2 residential investment to +18.9 percent from +20.3 percent, which shaved 0.1 percentage point off the firm’s second quarter growth estimate. U.S. GDP growth averaged just 1.1 percent in the fourth and first quarters. Benchmark revisions will make the upcoming batch of growth figures harder to read than usual.