Webtoon shares surged after an expanded tie-up with Disney. Here's what you need to know.Shares of Webtoon Entertainment (WBTN 39.17%) skyrocketed on Tuesday, peaking with a 42.5% one-day gain just after noon ET. The company just expanded its partnership with Walt Disney (DIS -0.25%), significantly boosting the business value of the Webtoon digital comics platform. Disney is back with a bigger dealAbout a month ago, on Aug. 12, Webtoon struck up an agreement with the House of Mouse. That deal involved about ...