Information Type and the Geography of Price Discovery

Local (Sao Paulo) and global (New York) markets contribute significantly to price discovery in dual-listed Brazilian shares, but their contribution varies over time. Local information shares increase by 8.4% on days when a stock experiences a significant idiosyncratic price swing, but do not similarly increase on earnings announcement days or on days when the whole local market experiences a significant price swing, despite an equally large increase in trading. Traders in the local market seem to have an advantage in collecting and processing company-specific unscheduled information, but not widely disseminated scheduled information which affects the company or the whole market.