The New Fama Puzzle

Matthieu Bussiere, Menzie Chinn, Laurent Ferrara and Jonas Heipertz
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Jonas Heipertz: Columbia University [New York]

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Abstract: We re-examine the historically common finding that ex post depreciation and the forward premium are negatively correlated, usually termed the forward premium puzzle. When covered interest differentials are zero, this finding is equivalent to the rejection of the joint hypothesis of uncovered interest parity (UIP) and full information rational expectations. We term this result the Fama puzzle (1984), given the difficulty in identifying a time-varying risk premium that could rationalize this result. In our analysis, the rejection occurs for eight exchange rates against the US dollar, but does not survive into the period during and in the decade after the financial crisis. Strikingly, in contrast to earlier findings, the Fama coefficient—the coefficient on the interest differential—then becomes large and positive; this is what we term the New Fama Puzzle. Using survey based measures of exchange rate expectations, we find much more consistant evidence in favor of UIP. Hence, the explanation for the switch in the Fama coefficient in the wake of the global financial crisis is mostly a change in how expectations errors and interest differentials co-move.

Date: 2022-04
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Published in IMF Economic Review, 2022, 70 (3), pp.451-486. ⟨10.1057/s41308-022-00161-z⟩

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Journal Article: The New Fama Puzzle (2022)
Working Paper: The New Fama Puzzle (2018)
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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-04459560

DOI: 10.1057/s41308-022-00161-z

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