What the sources establish.
The decision
The SNB ended its minimum exchange rate of CHF 1.20 per euro on 15 January 2015. It also reduced the interest rate on applicable sight-deposit balances to −0.75%.
Read the original document ↗The earlier regime
The minimum had been in place since 6 September 2011. A March 2015 SNB speech described growing international policy divergence as part of the background to ending it.
Read the original document ↗Keep the order in view.
Read the quote before reading the narrative
The minimum was expressed as Swiss francs per euro. A lower EUR/CHF number means one euro buys fewer francs; equivalently, the franc is stronger against the euro. Calling it a “franc floor” without identifying the units can invert the meaning. A useful first step is to rewrite the statement as a sentence about what one unit of the base currency buys.
A rule is part of the market environment
The analytical lesson is about conditional reasoning. A relationship observed while a policy rule operates does not show how the same market would behave without that rule. If an argument relies on a minimum rate continuing, that assumption belongs inside the argument. Treating it as permanent background hides the variable whose change matters most.
Do not turn a commitment into an execution guarantee
The original announcement establishes a policy decision. It does not specify the price at which a particular participant could execute an order, close a position or settle an obligation during the adjustment. Those claims would need venue records, transaction times, order instructions and contractual details. This distinction is useful whenever a story moves too quickly from a policy headline to a claimed trading outcome.
Interpret the package rather than one isolated instrument
The removal of the minimum and the negative-rate setting were different parts of the announced package. An analysis that sees only the interest-rate reduction loses the change in the exchange-rate framework. The broader reading habit is to list every material component of a policy announcement before attaching a single label such as “easing” or “tightening”.
What the case leaves open
A retrospective account cannot establish that a reader could have predicted the timing, traded at a chosen price or avoided a loss. Nor does it prove that every managed exchange-rate arrangement will end in the same way. The transferable question is narrower: which parts of the thesis depend on a policy rule remaining in place, and what evidence would tell you that the rule has changed?
The reciprocal check
Suppose, purely for arithmetic, a quote changes from 1.20 to 1.00 CHF per EUR. The euro’s franc price falls 16.67%, while the franc’s euro value rises 20%. These are hypothetical endpoints, not a reconstruction of the event’s high, low or available execution prices.
Which claim is supported by the SNB announcement?
Go beyond this reading.
These documents support the dated institutional record. They do not certify Equilon’s interpretation, guarantee a trading outcome or describe current market conditions.