Investor attention, information diffusion and industry returns

• We examine whether industry returns predict the aggregate market in Australia.
• Several industries significantly lead the market controlling for market predictors.
• An industry's predictive capacity is moderated by proxies for investor attention.
• Industry information diffuses more slowly when level of investor attention is lower.
• Provide new evidence in support of gradual information diffusion hypothesis

Using the monthly data for more than 1700 Australian stocks over the period from 1990 to 2009, we investigate whether industry portfolio returns predict the aggregate market. We find that a few industries significantly lead the market even controlling for well-recognized market predictors. However, unlike U.S. studies, we do not find that the ability of an industry to predict the market is closely related to its propensity to forecast economic growth. Instead, we find that the capacity of an industry to lead the market is significantly moderated by proxies for investor attention. In general, more neglected industries are more informative in leading the markets due to delayed investor attention to the information content of these industries; and the information contained in industry portfolio returns is incorporated into the market return more slowly during economic recession when investors pay less attention to the stock markets. Our research provides new empirical evidence in support of the gradual information diffusion hypothesis from a market that differs from the U.S. stock market.