11. A method for calculating sentiment using social media messages for the real-time evaluation of publicly traded assets wherein a sentiment is an integer computed based upon pairs of lexical items in local syntactic context, comprising: determining polarity in the social media messages based upon pairs of lexical items in local syntactic context; and determining a strength value of the lexical items used in the social media messages.
11. A method for calculating sentiment using social media messages for the real-time evaluation of publicly traded assets wherein a sentiment is an integer computed based upon pairs of lexical items in local syntactic context, comprising: determining polarity in the social media messages based upon pairs of lexical items in local syntactic context; and determining a strength value of the lexical items used in the social media messages. 18. A method according claim 11 , wherein the step of determining polarity includes deriving polarity of syntactic constituents in head-complement, modifier-modified, and subject-predicate relations.