Can risk explain the profitability of technical trading in currency markets?

Academic studies show that technical trading rules would have earned substantial excess returns over long periods in foreign exchange markets. However, the approach to risk adjustment has typically been rather cursory. We examine the ability of a wide range of models: CAPM, quadratic CAPM, downside risk CAPM, Carhart's 4-factor model, the C-CAPM, an extended C-CAPM with durable consumption, Lustig-Verdelhan (LV) carry trade factor model, and models including macroeconomic factors, and foreign exchange volatility, skewness and liquidity, to explain these technical trading returns. No model plausibly accounts for much of the technical profitability. This failure implicitly supports non-risk based explanations such as adaptive markets. (C) 2020 Elsevier Ltd. All rights reserved.