SNB and the franc: why the quiet pair isn't always quiet

[Shadow Trader]

The Swiss franc can drift for weeks with tiny ranges, lulling traders into complacency. Then the Swiss National Bank does something and the pair moves like it's making up for lost time.

The SNB's history includes the dramatic removal of the euro floor in 2015, and the bank still intervenes in currency markets at times, sometimes without announcement. That legacy gives CHF pairs fat tails, with rare but severe moves.

Quarterly SNB decisions and speeches by board members can trigger moves. Safe-haven flows also drive the franc during global risk-off episodes, when it tends to strengthen alongside the yen.

For scalpers, the low volatility invites larger position sizes, which is exactly the wrong response given the tail risk. Sizing for the worst day, not the typical day, is the sensible approach.

A related reminder: the franc often reacts to euro area developments too, since EURCHF is the most-traded franc cross and Switzerland's economy is closely tied to the eurozone. A move in EURCHF can spill into USDCHF and the other crosses even without Swiss news.

Has a quiet CHF pair ever delivered a nasty surprise, and how does sizing on franc pairs differ from other pairs?