The sell-off in UPS has gone too far. United Parcel Service (UPS 0.06%) stock gained an impressive 83% between 2020 and the end of 2021 -- benefiting from a shift away from services and in-store shopping toward home delivery. But since the beginning of 2022, UPS is down over 35% compared to a 12% gain in the S&P 500. Here's why the high-yield dividend stock deserved to sell off but is worth buying now. A major slowdown One look at a chart of UPS' stock price, sales, and operating margin, and it's easy to se ...