This paper investigates whether oil prices have a reliable and stable out-of-sample relationship with the Canadian/U.S dollar nominal exchange rate. Despite state-of-the-art methodologies, we find little systematic relation between oil prices and the exchange rate at the monthly and quarterly frequencies. In contrast, the main contribution is to show the existence of a very short-term relationship at the daily frequency, which is rather robust and holds no matter whether we use contemporaneous (realized) or lagged oil prices in our regression. However, in the latter case the predictive ability is ephemeral, mostly appearing after instabilities have been appropriately taken into account.

Despite advances in transactions technologies, paper currency still constitutes a notable percentage of the money supply in most countries. For example, it constitutes roughly 10% of the US Federal Reserve’s main monetary aggregate, M2. Yet, it has important drawbacks. First, it can help facilitate activity in the underground (tax-evading) and illegal economy. Second, its existence creates the artifact of the zero bound on the nominal interest rate. On the other hand, the enduring popularity of paper currency generates many benefits, including substantial seigniorage revenue. This paper explores some of the issues associated with phasing out paper currency, especially large-denomination notes.