Will Friday the 13th bring bad luck to the market? By: CNBC.com News September 12, 2013 at 17:18 PM EDT Paraskevidekatriaphobia is the fear of Friday the 13th. For the stock market, however, this 'unlucky' day tends to be relatively calm. Read More >> Related Stocks: Alcoa Bank of America Chevron Corp Hewlett-Packard Microsoft Procter & Gamble Staples