Personal savings rate jumped to over 30% in mid 2020 and again above 25% recently (lines up w/ stimulus payments). Historically this value has been 3 - 10% for the last 30 years or so. So there's a lot of money on the sidelines
What you see is a supply side inflation (less goods due to supply chain interruption) and not demand side (more money).
So there's going to be a lot of economic "whiplash" in comparing YoY metrics over the next few months.
You can see the effect here in cars sales:
https://www.goodcarbadcar.net/usa-auto-industry-total-sales-...
Apr 2020 was the lowest sales month by a healthy margin going back to 2005.
Different industries saw this same effect over the April-May period. You can see the looking at the performance of the total US stock market:
https://www.marketwatch.com/investing/fund/vtsmx
March-April prices collapse, and April-May, its on the upswing, by September, there's a total recovery.
There have been large liquidity injections since April of 2020, it's possible that we're looking at a very weird covid April/May + inflation.
Source: https://fred.stlouisfed.org/series/CPIAUCSL#0
May 2019: 255.371 May 2020: 255.942 Apr 2021: 266.832 May 2021: 268.551
thanks, edited that in too.
edit3: These are not defined as the same, they are coincidentally the same number
Monthly annualised and and quarterly annualised are a common measure - those both run between 8-9%. Not that that is anything to worry about - it's just the reversal of the -2% quarterly annualised inflation this time last year. (I.e. oil prices are back up at their previous price of $70/bbl after having gone to zero a year ago)
It's not even annualized, according to the WSJ title it's 5% from May 2020.
Thanks, edited my comment reflect that.
Look at chart 1:
Apr2021 had 0.8% month to month May2031 had a 0.6% month to month.
Which annualize ((1+i)^12) to: 10% and 7% respectively.
Or, a better estimate:
((1.008)*(1.06))^6=1.087
Or 8.7%
And, this doesn't include that most of the money printed hasn't been allowed to slosh around yet and instead are being used to prop up financial markets.
edit: it isn't annualized, but rather YOY
edit2: annualized == YOY, so either statement is correct