The sudden surge marked Wendy's biggest jump since March 2020, when markets rebounded from the pandemic-driven crash. The burger chain — known for menu staples like the Frosty, Dave's Triple burger and the Biggie Deal — has endured a painful stretch on Wall Street. Its shares fell more than 70% since mid-2023, making it the type of beaten-down stock that often attracts speculative traders looking for a dramatic rebound. The company also had another characteristic that meme-stock investors frequently seek ou ...