SPY to follow DJT and XHB

In last year's big move up SPY trailed DJT (Dow Jones Transportation Index) and XHB (A Homebuilders ETF) by 2-months and 1-month respectively. In November, DJT crashed. In December, XHB crashed. It's January now. If nothing is being delivered, and homebuilders have no one to sell to that can't be good for the greater market.