“With weekly option expirations, trading in Apple tends to get weird at the end of the week,” Philip Elmer-DeWitt reports for Fortune.

“What was the significance of those long red vertical lines in Apple’s (AAPL) 60-second chart Friday a.m.?” P.E.D. wonders. “Were they computer glitches? Human error (so-called fat finger trades)? Something more sinister? Your guess is as good as mine.”

Check out the chart in the full article here.

[Thanks to MacDailyNews Readers “Dan K.” and “Ellis D.” for the heads up.]