There are numerous firms trying to use automated trading platforms to attempt to analyse social media to detect sentiment around brands, companies and sectors a

There are numerous firms trying to use automated trading platforms to attempt to analyse social media to detect sentiment around brands, companies and sectors and trading on the results, although it's early days. The observations by the author of both this post and the original HuffPo piece are casual but the area is interesting. It would have been better to compare the the movement on those days to one of the broader stock indexes, like the S&P 500 or Russell 2000 etc. Relative movement to the broader market compared to the typical variance would give a better picture. BTW I believe HN etiquette is to not modify Titles from source posts gratuitously.