Social-media stocks cringe as Facebook falls

Investors in social-media stocks, including Facebook, didn't have to wait long to experience their own dot-com drubbing.

Facebook stock fell below $30 Tuesday, tumbling $3.07 to $28.84, the fourth decline in its seven days of trading. It's now down 24% from its IPO price, making it the 19th worst initial public offering of 125 in the past 12 months.