Yum Brands Inc. chain Pizza Hut launched the Beyond Sausage Pizza and Beyond Sausage Veggie Pizza in Puerto Rico on Monday, both made with a plant-based topping from Beyond Meat Inc. . Both pizzas will be available for a limited time. Beyond Meat has partnered with a number of fast-food chains, including another Yum Brands name, KFC. Yum Brands stock has tumbled nearly 10% for the year to date. Beyond Meat has soared 74%. And the S&P 500 index is up 3.7% for 2020 so far.Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.