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Price Stability of Cryptocurrencies as a Medium of Exchange

Tatsuru Kikuchi, Toranosuke Onishi and Kenichi Ueda ()
Additional contact information
Tatsuru Kikuchi: Faculty of Economics, The University of Tokyo
Toranosuke Onishi: Tokio Marine & Nichido Fire Insurance Co., Ltd.

No CARF-F-526, CARF F-Series from Center for Advanced Research in Finance, Faculty of Economics, The University of Tokyo

Abstract: We present positive evidence of price stability of cryptocurrencies as a medium of exchange. For the sample years from 2016 to 2020, the prices of major cryptocurrencies are found to be stable, relative to major financial assets. Specifically, after filtering out the less-than-one-month cycles, we investigate the daily returns in US dollars of the major cryptocurrencies (i.e., Bitcoin, Ethereum, and Ripple) as well as their comparators (i.e., major legal tenders, the Euro and Japanese yen, and the major stock indexes, S&P 500 and MSCI World Index). We examine the stability of the filtered daily returns using three different measures. First, the Pearson correlations increased in later years in our sample. Second, based on the dynamic time-warping method that allows lags and leads in relations, the similarities in the daily returns of cryptocurrencies with their comparators have been present even since 2016. Third, we check whether the cumulative sum of errors to predict cryptocurrency prices, assuming stable relations with comparators’ daily returns, does not exceeds the bounds implied by 1 the Black-Scholes model. This test, in other words, does not reject the efficient market hypothesis.

Pages: 128
Date: 2021-11
New Economics Papers: this item is included in nep-fdg, nep-fmk, nep-mon and nep-pay
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Working Paper: Price Stability of Cryptocurrencies as a Medium of Exchange (2021) Downloads
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