CNBC's Jessica Ettinger reports on disappointing new construction home sales, with nearly half a million completed homes sitting unsold in July. A 9.6-month supply signals a high inventory market, exacerbated by mortgage rates rebounding to near 7% after geopolitical tensions. While builders reduced their interest rate buy-downs, they did lower median sale prices by 2.3% to $393,800, making new builds slightly cheaper than the previous year.