Pending home sales grew for a fourth-straight month in November and housing supply just hit a four-year high. But that’s partly because many listings are “stale inventory,” sitting on the market for at least 60 days. Also in this episode: An old material used in a new way for climate-friendly high rises, social media budgeters breathe new life into the cash-in-envelopes strategy, and seniors on Medicare will pay less out of pocket for prescriptions starting Jan. 1.