Two opposite positions are found in the financial literature. The first based on an econometric approach maintains that series of short-term interest rate series are non stationary. The second, associated with studies on term structures assumes that these series are stationary. This article attempts to discriminate between these two positions.
AFTALION, F. and PONCET, P. (1993). La dynamique des taux d'intérêt à court terme en France. ESSEC Business School.