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The New Fama Puzzle

Matthieu Bussiere (), Menzie Chinn (), Laurent Ferrara () and Jonas Heipertz

No 24342, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: We re-examine the Fama (1984) puzzle – the finding that ex post depreciation and interest differentials are negatively correlated, contrary to what theory suggests – for eight advanced country exchange rates against the US dollar, over the period up to June 2019. The rejection of the joint hypothesis of uncovered interest parity (UIP) and rational expectations – sometimes called the unbiasedness hypothesis – still occurs, but with much less frequency. Strikingly, in contrast to earlier findings, the Fama regression coefficient is positive and large in the period after the global financial crisis. However, using survey based measures of exchange rate expectations, we find much greater evidence in favor of UIP. Hence, the main story for the switch in Fama coefficients in the wake of the global financial crisis is mostly – but not entirely – a change in how expectations errors and interest differentials co-move. The durability of this phenomenon depends on the persistence in patterns in expectations errors, and the variability of those errors as well as of interest differentials.

JEL-codes: F31 F41 (search for similar items in EconPapers)
Date: 2018-02
New Economics Papers: this item is included in nep-opm
Note: IFM
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