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Market strains create new dilemmas for central banks

  • As the recent breakdown of the UK Gilt market illustrates, policymakers face an increasingly difficult trade-off between combating inflation, supporting economic growth and maintaining financial stability. With core bond and currency markets facing very high volatility and worsening liquidity conditions, we think the risk that central banks have to step in again to prevent a destabilising cycle of panic selling and money market distress has risen, even if that would clash with plans to tighten monetary policy further.
  • Although most measures of core money market stability have remained in relatively benign territory since we published our last Financial Market Stress Monitorin late May, both realised and implied volatility in key bond and currency markets have continued to rise and are approaching worrying levels. (See Chart 1.) The BoE and the ECB have already been forced to shore up their government bond markets, while the BoJ, the PBOC, and several other Asian central banks appear to be intervening in foreign exchange markets to limit the pace and extent of their currencies’ depreciations against the dollar. In the US, there is speculation that the Treasury may institute a “buyback” programme to improve government bond market liquidity.
  • In other words, in Europe and, to a lesser extent, the US, preserving financial stability appears increasingly at odds with fighting inflation (and entirely incompatible with the sort of fiscal stimulus briefly contemplated in the UK). And the Fed’s aggressive policy tightening is causing difficulties for economies where underlying growth and inflation dynamics are less robust. The FOMC may still be able to thread the needle between tightening financial conditions enough to cool down the US economy and slow inflation but not so much as to destabilise financial markets and the global economy. But the balancing act is getting tougher.
  • Core money markets have held up well despite ongoing financial volatility and economic uncertainty.
  • Volatility in core bond and currency markets is unusually high, and liquidity conditions have worsened.
  • Banking sector equities have fallen further; perceived credit risk has risen to the highest level since 2013.
  • CDS premia of core DM sovereigns have risen and euro-zone periphery markets remain under pressure.
  • The risks arounds some EM sovereigns have continued to rise, in several cases into distressed territory.

Chart 1: BofAML MOVE Index Of Option-Implied Volatility & 10-Year US Treasury Yield

Sources: Refinitiv, Capital Economics

 

United Kingdom

  • UK financial markets have gone through a month of extreme volatility (2). Although that volatility started to rise once it became clear that Liz Truss was likely to become Prime Minister, probably in part due to perceived risks around her fiscal approach, it only really surged following the “mini-budget” on 23rd September. That pushed the ECB’s systemic stress indicator for the UK to its highest level relative to the US measure since the ERM crisis (3), and broadly in line with the equivalent euro-zone measure.
  • The Gilt market was at the centre of the volatility in the UK, especially at longer maturities. The 30-year Gilt yield saw daily swings orders of magnitude larger than on any day since at least the early 1990s (4), in part due to the liquidity problems of so-called liability-driven investment mechanisms used by pension funds that hold a large share of long-term Gilts. While volatility (and bond yields) have dropped back after an abrupt policy U-turn (and the resignations of Kwasi Kwarteng and Liz Truss), liquidity conditions still appear worse than before the mini-budget, as evidenced by, for example, wider bid/ask spreads (5).
  • The pound also saw a surge in volatility (6). 3-month risk reversals suggest a substantial risk premium emerged in sterling, which is still far from subsiding (7). Given the ongoing political chaos in the UK, it wouldn’t be surprising if some residual risk premia was baked into some UK assets for some time yet.

Chart 2: 30-Day Implied/Trailing Volatility (Std Devs)

Chart 3: ECB Composite Indicators Of Systemic Stress

Chart 4: 30-Year Gilt Yield 1-Day Changes (bp)

Chart 5: UK Conventional & Index-Linked
30-Year Gilt Bid/Ask Spreads (bp)

Chart 6: GBP/USD 1-Day Changes (%)

Chart 7: 1-Month 25-Delta Risk Reversals (pp)

Sources: Refinitiv, Capital Economics


Money Markets

  • Core money markets have remained relatively calm despite the worsening outlook for the global economy and the extreme volatility in key bond and currency markets. Spreads between secured and unsecured lending rates remain lower than their brief spike around the start of the Russian invasion of Ukraine (8). Cross-currency basis swaps for the major currencies have also widened, but appear mainly to reflect the usual year-end effects (9). The widening of the Swiss franc basis and the SNB’s use of its dollar swap line with the Fed appears to reflect arbitraging by some Swiss banks related to the SNB’s tiered reserve policy.
  • The spread between the 3-month US repo rate and T-bill yield has remained volatile (10). In part, this may simply reflect the rapid increase in the US policy rate and ongoing high volatility in the Treasury market. The Fed’s reverse repo facility and the relative scarcity of T-bills also play a role: more than $2.2trn of cash that might otherwise be available in the private repo market now sits in the reverse repo facility, and the balance has continued to increase even as the Fed’s overall balance sheet has started to shrink (11).
  • Short-term corporate spreads in the major advanced economies have increased somewhat, but remain well short of crisis levels (12). The spreads of investment-grade bonds have also risen, especially in the euro-zone and the UK, where they are approaching levels only seen during recessions (13).

Chart 8: US 3M LIBOR - OIS Spread (bp)

Chart 9: 3M Cross-Currency Basis Swaps Vs USD (bp)

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Chart 10: USD 3M Repo Rate – 3M T-Bill Yield (bp)

Chart 11: Selected Fed Liabilities ($bn)

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Chart 12: 3M Yield Spreads Of Commercial Paper Over Gov’t Bonds (bp)

Chart 13: OAS Of ICE BofA ML IG Corp. Bond Indices (bp)

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Sources: Refinitiv, Bloomberg, Capital Economics


Market Liquidity & Volatility

  • Both realised and implied volatility is at very high levels across major bond and currency markets, although equity markets have been less affected (14). The MOVE Index of implied volatility of US Treasuries remains close to its peak in early 2020 and, unlike that spike, shows little sign of falling back so far (15). Liquidity in government bond markets has continued to deteriorate, sparking speculation that the US Treasury may announce a buyback programme for less liquid “off-the-run” bonds (a tool it last used in 2000-02) (16). In the UK, a breakdown in bond market functioning forced the BoE to intervene (see UK section).
  • Currency market implied volatility is also as high as it has been over the past two decades outside of the GFC (17). Risk reversals are also consistent with a view that risks are skewed heavily towards a further surge in the dollar, consistent with the worsening outlook for global economic growth and financial stability (18). Japan’s decision to intervene in support of the yen, for the first time since 1998, and efforts by several other Asian economies to prop up their currencies suggest policymakers are increasingly worried by the effects of the dollar’s continued rapid appreciation. By contrast, major equity markets have remained relatively orderly: the VIX Index has remained well below long way from its peaks in 2020 and 2008 (19).

Chart 14: Implied Volatility (Z-scores Since 2013)

Chart 15: ICE BofA ML MOVE Index