On balance, the Bank’s analysis and empirical studies suggest there are no strong reasons to think that the housing tools have any significant negative long-run impact on the growth of supply capacity. The housing tools will bind more when housing activity is stronger and lenders are loosening underwriting standards, increasing both the gross benefits (i.e. reducing GDP-at-risk in a downturn) and gross costs (i.e. reducing demand by excluding some borrowers from the market). To test if net benefits are positive across different states of the world the FPC reviews central, upside and boom scenarios.20 In each scenario we first estimate the distribution of borrower indebtedness absent the tools (shown in blue shading, Chart 13, for the boom scenario). This includes an assumption about how lenders’ underwriting standards would have evolved without the tools in place. A second simulation then estimates how the distribution of indebtedness evolves differently with the tools in place (shown in pink shading, Chart 13, for the boom scenario). The gross benefits of the tools arise from a reduction in GDP-at-risk associated with the less risky debt distribution with the tools in place, compared to the risker scenario without the tools. To weigh these benefits off against the costs (the temporary reduction in housing activity) requires assumptions about the persistence of each, society’s discount rate, the probability of a downturn occurring – as the benefits are only realised in a downturn, and the preferences of the policymaker (as encapsulated in parameter 𝜙).

The euro has depreciated substantially against the US dollar and this, in turn, has caused the Swiss franc to weaken against the US dollar. In these circumstances, the SNB has concluded that enforcing and maintaining the minimum exchange rate for the Swiss franc against the euro is no longer justified. Interest rate lowered At the same time as discontinuing the minimum exchange rate, the SNB will be lowering the interest rate for balances held on sight deposit accounts to –0.75% from 22 January. The exemption thresholds remain unchanged. Further lowering the interest rate makes Swissfranc investments considerably less attractive and will mitigate the effects of the decision to discontinue the minimum exchange rate. The target range for the three-month Libor is being lowered by 0.5 percentage points to between –1.25% and –0.25%. Outlook for inflation and the economy The inflation outlook for Switzerland is low. In December we presented a conditional inflation forecast, which predicts inflation of –0.1% for this year. Since this forecast was published, the oil price has once again fallen significantly, which will further dampen the inflation outlook for a time. However, lower oil prices will stimulate growth globally, and this will influence economic developments in Switzerland positively. Swiss franc exchange rate movements also impact inflation and the economic situation. The SNB remains committed to its mandate of ensuring medium-term price stability while taking account of economic developments. In concluding, let me emphasise that the SNB will continue to take account of the exchange rate situation in formulating its monetary policy in future.