In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.

Sentence 1: Allie bought some shares of stock. Sentence 2: She bought more than what she had. Sentence 3: She didn't realize this at first. Sentence 4: But her broker called her to tell her to deposit money. Sentence 5: Allie immediately called her bank and made the transfer.
Margin call