Netizens can now predict market sentiments with nearly 90 per cent accuracy by analysing Twitter feeds, a study has found.

Researchers at Indiana University Bloomington’s School of Informatics and Computing have found that there is a correlation between the value of the Dow Jones Industrial Average (DJIA) and public sentiment, after analysing more than 9.8 million tweets from 2.7 million users during 10 months in 2008.

The IU scientists said that analysis of the collective public mood derived from millions of tweets can predict the rise and fall of the DJIA up to a week in advance with a 90 per cent accuracy.

The study was carried out by Associate Professor Johan Bollen and Ph.D. candidate Huina Mao, who analysed text content of a large-scale collection of Twitter feeds to measure variations in public mood.

With the help of two mood-tracking tools — OpinionFinder and Google-Profile of Mood States (GPOMS) —the scientists analysed the Twitter feeds and then compared them to closing stock market values.

OpinionFinder, analysed the tweets daily at a particular time to provide a positive or negative feedback about the public mood, while, GPOMS measured the mood of tweets in six dimensions: calm, alert, sure, vital, kind, and happy.

“What we found was an accuracy of 87.6 per cent in predicting the daily up and down changes in the closing values of the Dow Jones Industrial Average,” Bollen said.

The researchers found the OpinionFinder positive/negative sentiment input had no effect on prediction accuracy, while the calm and the calm-happy combination of the GPOMS had the highest prediction accuracy. “In fact, the calmness index appears to be a good predictor of whether the Dow Jones Industrial Average goes up or down between two and six days later,” Bollen said.

Earlier studies had linked the performance of the Indian cricket team with the country’s stock market Sensex.

According to a study by Monash University the “poor” performance of India, in one day matches can significantly impact fortunes of the Indian stock market. Moreover, when Sachin Tendulkar plays in the losing side, the loss in the stock market could be 20 per cent more.

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