Twitter Is Falling Hard

For the second day in a row, Twitter stock is dropping hard.

As of 10 a.m., it was down nearly 4%, trading at about $30.65 per share. Tuesday was a horrible day for Twitter. It fell nearly 18%.

Part of the reason why Twitter fell so much is because the employee lockup period expired Tuesday. Many employees likely cashed in their stock. But it's important to note Twitter's founders and biggest stakeholders have said they don't plan to cash in.

Twitter's tumble began last week when it reported that its monthly active user growth is slowing. It has 255 million monthly active users, which is smaller than Facebook (1.28 billion), LinkedIn (300 million), and WhatsApp (500 million).

Still, Twitter's financials look pretty good. And because Twitter bought the mobile ad company MoPub last year, it has a nice safety net in its mobile ad network.