A rush of homes go under contract in January, but it’s unlikely to last

Saul Loeb | AFP | Getty ImagesA sharp drop in mortgage interest rates brought homebuyers out in force in January, but rates have bounced back higher again, so the gains may be short-lived.Signed contracts on existing homes jumped 8.1% last month compared with December, according to the National Association of Realtors. That’s the second straight…