You know those technical issues that the stock exchanges were having a little while back? They’re still here.

Some premarket transactions in nine big-name stocks were canceled Thursday morning, in the latest example of the trading glitches that have plagued markets this year…

The bad trades came from a securities firm that was sending transactions based on faulty data, said people familiar with the problems. It wasn’t clear where the bad data originated.

Just a little glitch, right? Not exactly. Read more »