Because implied volatility is essential for pricing options, analyzing derivative strategies and measuring risk in investment portfolios containing derivatives, understanding variations in implied volatility also becomes vital. Aside from a secular trend, volatility clustering and calendar...

Over the past two decades, substantial research has established the importance of sentiment in financial markets. We know that sentiment impacts investor decisions; because of advanced text mining and sentiment analysis techniques, automated trading strategies based on sentiment are prevalent....

We explored in this study the impact of social media on the viewership of mass media news in the stock market. We argue that the popularity of a topic on social media can affect the viewership of news articles the next day on this same topic. Moreover, the detailed characteristics of how social...

Where can we get good ideas with low cost? Recent researchers probably would suggest “the crowd.” Indeed, crowdsourcing has increasingly been the easiest and most inexpensive method to gain creative/innovative ideas. With the current or potential shortage of R&D resources, firms are...