Abstract
The paper analyzes how traders in two major oil futures markets: New York Mercantile Exchange (NYMEX) and Intercontinental Exchange, reacted to the 2008 financial crisis, particularly whether they shifted their trading pattern and whether the relative information role of the two markets changed. Using trade-by-trade data, the paper analyzes several trading characteristics including trading volume, trade size, volatility, bid–ask spread, and relative information share. On average, NYMEX is characterized by greater volume, trade size and slightly greater spread. Before the crisis, NYMEX leads the process of price discovery, and volatility and trade size are significant factors explaining this leadership. However, following the financial crisis of 2008, the leadership role of NYMEX declines and trade size and volatility are no longer significant factors. Contrary to results of most equity market research, bid–ask spread is not a significant factor in information share and causality tests indicate that causality runs from spread to information share before the crisis but the opposite holds during the crisis period.
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