Quote from nutmeg:
One report, authored by academics Johan Bollen, Huina Mao and Xiao-Jun Zeng, says the degree of "calmness" of the Twitterverse can predict - with 87.6 percent accuracy - how the Dow Jones industrial average will move two to six days ahead of time.
Quote from nutmeg:
One report, authored by academics Johan Bollen, Huina Mao and Xiao-Jun Zeng, says the degree of "calmness" of the Twitterverse can predict - with 87.6 percent accuracy - how the Dow Jones industrial average will move two to six days ahead of time.

Quote from kinggyppo:
"To assess the statistical significance of the SOFNN achieving the above mentioned accuracy of 87.6% in predicting the
up and down movement of the DJIA we calculate the odds of
this result occurring by chance. The binomial distribution indicates that the probability of achieving exactly 87.6% correct
guesses over 15 trials (20 days minus weekends) with a 50%
chance of success on each single trial equals 0.32%. Taken
over the entire length of our data set (February 28 to December
20, excluding weekends) we find approximately 10.9 of such
20 day periods. The odds that the mentioned probability would
hold by chance for a random period of 20 days within that
period is then estimated to be 1(10:0032)
10:9 = 0:0343 or 3.4%. The SOFNN direction accuracy is thus most likely not the result of chance nor our selecting a specifically favorable
test period. "
![]()