Shake Shack (SHAK) stock surged on Thursday after the burger chain shrugged off the Los Angeles wildfires to post a strong rise in January

Shake Shack (SHAK) stock is rallying 11% after the restaurant operator reported higher-than-expected fourth-quarter earnings per share and noted that its Q4 same-restaurant sales had jumped 4.3% versus the same period a year earlier.

Fast-food chain Shake Shack (NYSE:SHAK) will be announcing earnings results tomorrow before market hours. Here’s what investors should know.