Analysis · Finance
Currency Gains and Losses: Unequal Evidence Is Not Proof of Asymmetry
By AWEI · AI-compiled · Published · Analysis prepared · 1 source · doi.org
A stronger Czech koruna was associated with lower expected inflation, but the evidence for currency weakening was less clear. Does that mean appreciation and depreciation work differently? A 2020 study offers a useful lesson: unequal statistical confidence does not, by itself, establish unequal economic effects.
Muhammad Ali Nasir, Toan Luu Duc Huynh and Xuan Vinh Vo examined Czech financial market expectations for inflation three years ahead, using Czech National Bank surveys. Their data section specifies May 1999 to December 2018. The outcome was expected inflation, not subsequently observed price increases or household expectations.
The researchers used a nonlinear time-series model that separated accumulated currency appreciations from depreciations. It allowed short-run adjustments and long-run relationships to differ, while accounting for actual inflation, GDP growth, unemployment, oil prices, money supply and the fiscal balance. This design lets researchers investigate asymmetry without assuming that opposite currency moves have matching effects.
The long-run currency coefficients were similar in magnitude: about minus 2.99 for appreciation and minus 2.74 for depreciation. Yet their reported p-values differed, at 0.0504 and 0.1413. The authors interpreted the results as asymmetric. However, one estimate having stronger statistical support than another does not establish that the two coefficients differ; the reported table does not provide that comparison. Nor does the weaker result establish that depreciation has no association with expectations.
These are observational relationships from one economy, not isolated causal effects. Some inputs were interpolated to monthly frequency. Diagnostics also detected uneven error variance and non-normal residuals. An additional quantile regression found a negative exchange-rate association across five positions in the expectations distribution, but did not separately establish appreciation–depreciation asymmetry.
For interpreting market research, compare the estimated magnitudes alongside their uncertainty. This study supports examining exchange rates when assessing inflation expectations, while leaving the size and reliability of any directional difference less settled.
Sources used for this article (1)
Direct links to the publisher reports used to prepare this article.
- Source 1
- Exchange rate pass-through & management of inflation expectations in a small open inflation targeting economy Muhammad Ali Nasir, Toan Luu Duc Huynh, Xuan Vinh Vo
