Chipotle Mexican Grill Inc.’s historic stock-split proposal spotlights the enormity of this yr’s bull run by displaying the lengths the fast-food chain should go to convey its shares inside attain of those that take pleasure in its inexpensive burritos.The 50-to-1 break up introduced on Tuesday will probably be one of many largest ever on the New York Inventory Trade if shareholders approve it at Chipotle’s annual assembly on June 6, the California-based firm mentioned. If it’s agreed to, the inventory will start buying and selling on a post-split foundation on June 26.