Home prices could drop for the next 6 months as inventory rises by the biggest margin since the financial crisis, investment strategist says

• Home prices could start falling as soon as the end of summer, one strategist predicts.
• That's due to a sharp rise in unsold homes, with inventory climbing 16% year-per-year in April.
• That's the highest increase in unsold inventory recorded since the Great Financial Crisis.

There's good news for sidelined homebuyers: buying a house may be about to get cheaper.