Will All-Time High US Inflation Really Be Transitory?

As shown by the graph below, last week the US consumer price index (CPI) jumped to the highest level since the 2008 Financial Crisis, reaching 5.4% Year-on-Year (Y/Y), compared to the expected 4.9%. The Core reading showed the largest Y/Y increase since November 1991, coming out at 4.5% compared to the expected 4.0%.

US CPI 2008Due to the current circumstances, this rapid increase in inflation would not normally warrant the need to worry, as this is bound to happen due to a year of pent-up demand. However, there is worry, especially among leading economists such as Lawrence Summers, that the Fed has been extremely excessive in their  support and that, without monetary tightening, we may soon be heading to an overheating of the economy. 

As of now though, the insistence by the Fed that this high inflation is only transitory seems to be supported. Looking below at data from the US Bureau of Labour Statistics, we see that the main factors driving up inflation are energy prices and used cars (highlighted in red), which are commonly temporary factors caused by pent-up demand.

US CPI breakdown June 2021While transitory inflation is supported by the data as of now, markets do not seem to be completely sure. After the release of the CPI data, the Nasdaq 100 swiftly dropped over 125 points, due to fears of inflation being out of control and the prospect of monetary tightening, 2 hours later the Nasdaq 100 was back at all-time highs after reassurance by the Fed that inflation is only transitory.  

Although inflation seems to be transitory, this is not necessarily going to be true over the next few years without monetary tightening. There are signs of monetary tightening being discussed by members of the FOMC and hints of interest rate rises in 2023 and a slowdown of bond buybacks. However, this is bad news for the equities market, which has enjoyed the highest levels of liquidity for years.

In conclusion, without monetary tightening, high US inflation will start to grow exponentially as high energy prices start to cause similar rises across all sectors. The reality is that the record highs enjoyed in the market will not last as interest rates inevitably rise and liquidity levels fall due to a slowdown of bond buybacks. With a vast monetary tightening programme, everything points to inflation being transitory, how severely this will hit the market is still yet to be seen.

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