Can the interest rate booster at ZinsPlus also be negative?

No, the additional yield—also known as the interest booster—cannot be negative. The interest booster is currently 0.40%, resulting in a total yield of 2.30%. Rising or falling stock markets have no direct influence on ZinsPlus, as the banks that receive the security basket and “pay” the interest rate booster in return bear the risk and opportunities of the security basket. This mechanism allows you to benefit from returns slightly above the European Central Bank’s key interest rate without bearing any risk on the stock market.