The Second Turn: How Higher Yields Become a Growth Drag

The fiscal-risk shock becomes a growth problem when the higher sovereign yield stops being a price on government debt alone and becomes part of the private economy's cost of capital. This chapter follows that second turn through the yield curve, private borrowing, equity valuations, and bank risk. The aim is to explain why the initial demand boost can coexist with a later fall in production, and to separate the channels the BIS study measures directly from the interpretations that connect them.

Sovereign repricing becomes economy-wide financial tightening

Government bonds sit near the centre of the financial pricing system. Their yields are used as a reference for other borrowing and as an input into the value investors assign to future cash flows. When a fiscal-risk shock raises sovereign yields across maturities, the government is not the only borrower that faces a changed price. Private borrowers may pay more, investors may demand greater compensation for risk, and projects whose returns were acceptable at the old discount rate may no longer look attractive.

The yield curve matters because its different maturities transmit different information. A rise in the long end can reflect a larger term premium, more inflation risk, more expected currency depreciation, or greater concern about sovereign repayment. The BIS study finds that ten-year yields rise persistently after a fiscal-risk shock and that the spread between ten-year and one-year yields rises for roughly the first ten months. A steeper curve is not merely a technical chart pattern: it signals that the longer financing horizon has become more expensive relative to the short rate.

That change reaches investment before it necessarily appears in a headline output figure. Firms compare the expected return on a project with the cost of financing and the return available on a safer asset. When the benchmark and risk compensation rise, some investment is delayed or cancelled. Households face a related calculation when deciding whether to borrow or bring forward a major purchase. The evidence does not say that every firm or household responds identically; it shows why a sovereign repricing can tighten the conditions under which private decisions are made.

Asset prices add a second route. The value of an equity claim depends partly on the present value of future earnings. A higher rate used to discount those earnings lowers the value of the same expected cash flow. Investors may also anticipate a larger future tax burden or greater uncertainty about fiscal policy as the government services a larger and more expensive debt stock. The BIS study finds that equity prices fall persistently after a fiscal-risk shock, although the effect is imprecisely estimated. The direction is consistent with both a discount-rate effect and a decline in confidence about future growth; the data do not cleanly assign the fall to one explanation.

Banks create a third connection between sovereign and private risk. A bank that holds government debt or depends on sovereign collateral can be affected when the value and safety of that debt are questioned. A weaker sovereign can therefore make the banking system look more exposed, while weaker banks can reduce the supply of private credit. In the BIS evidence, bank credit-default-swap spreads rise about four months after a positive fiscal-risk shock and remain significantly elevated for roughly a year. This lag is consistent with a financial-amplification channel, though it is not a complete model of bank lending or a decomposition of the output effect.

The practical meaning of the chain is easier to see from a borrower’s perspective.