Abstract
This paper examines whether the 2007 - 2008 global financial crisis (GFC) played any role in changing the state of efficiency for the foreign exchange markets. For comparison purposes, I assess market efficiency based on the forward unbiasedness hypothesis (FUH) as well as the profitability of simple technical trading rules in the form of moving average, momentum, and relative strength index. A general finding from my comparative analysis (the FUH vis-à-vis technical trading rules) reveals that the GFC causes a time variation in the performance of currency markets, but both tests predict opposite conclusions on the direction of the change in the state of market performance. This evidence emphasizes the importance of qualifying the difference between fundamental and technical information when investigating the efficiency of foreign exchange markets.
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