Marcel Fratzscher, Lukas Menkhoff, Lucio Sarno, Tobias Stöhr, 23 February 2018

Central bank interventions in foreign exchange markets have long been viewed with scepticism by academics. This column examines foreign exchange interventions for a sample of 33 advanced and developing economies. Interventions occur frequently, in episodes that can last several days, and are often successful in smoothing exchange rates. These results show that central bankers, particularly in emerging markets, appreciate the efficacy of interventions.

Claudio Borio, Robert McCauley, Patrick McGuire, Vladyslav Sushko, 28 September 2016

Covered interest parity is close to a physical law in international finance, yet it has been consistently violated since the Global Crisis. Violations since 2014, once banks had strengthened their balance sheets and regained easy access to funding, are especially puzzling. This column argues that the violation reflects a combination of foreign exchange hedging demand and tighter limits to arbitrage. Hedging demand has been boosted, in particular, by divergent monetary policies in an ultra-low interest rate environment, while tighter limits to arbitrage result from a stricter management of banks’ balance sheets.

Michael Melvin, Mark Taylor, 06 November 2009

The timing of the subprime crisis that became the global crisis is well known. Its impact on the foreign exchange markets has been much less discussed. This column fills that void. Its findings suggest that foreign exchange portfolio managers could have protected their portfolio by an appropriate risk control strategy using market stress indicators.

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