Twilio Inc (NYSE:TWLO) stock is trading at two-year highs today, following an upgrade from Wells Fargo to "overweight" from "equal weight," to go with a price-target hike to $120 from $80. The firm said the stock could be the new "pick-and-shovel play" in the realm of growing artificial intelligence (AI). This is just the latest in a long string of bull notes for the recently rallying cloud stock, which has been moving higher since a 14.3% post-earnings bull gap on Oct. 31. At last glance, TWLO was up 3.3% ...