NYSE Technical Glitch Causes Massive Stock Price Swings

Berkshire Hathaway and dozens of other stocks experienced extreme volatility before the issue was resolved.

A technical issue at the NYSE caused trading halts and extreme price drops for over 40 stocks, including Berkshire Hathaway and Barrick Gold.
Berkshire Hathaway's Class A shares temporarily fell 99.97%, dropping from $627,400 to $185.10 before the error was corrected.
The glitch was attributed to a problem with the Consolidated Tape Association's price banding software, which has since been reverted to a previous version.
All erroneous trades during the glitch were canceled, and trading resumed normally by late morning.
The NYSE is investigating the cause of the issue, with no indications of a cyberattack.