Possible Clues:

• Fast-food NYSE ticker symbol
• Year that Chaucer died
• The Golden Arches, on stock tickers
• End of Chaucer's century
• Livy's 1,400
• Ovid's 1,400
• C x XIV
• Fast-food giant, on Wall St.
• 1400, in old Rome
• Fast food giant, on the ticker