Since the beginning of 2015, when the CHF Libor index turned negative, there has been a temptation among individuals whose loan agreements are tied to interest rate formulas referencing this index to demand interest payments from their lenders, somewhat encouraged by the common usage of the notion of negative interest rates in the press and the world of finance.
However, the connection is not necessarily straightforward: the interest rate index and the loan interest are two distinct concepts whose domains do not necessarily overlap.
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