Money Supply is a very important indicator. It helps show how tight or loose current monetary conditions are regardless of what the Fed is doing with interest rates. Even if the Fed is tight, if Money Supply is increasing, it has an inflationary effect.One key metric shown below is the “Wenzel” 13-week annualized money supply figure. It was made popular by the late Robert Wenzel who tracked the metric weekly as an indicator of where the economy might be headed. In 2020, the Fed started reporting the data monthly instead of weekly. It should also be noted that Money Supply data can be heavily revised in future months.

Recent Trends
Seasonally Adjusted Money Supply is delayed by a month. The decrease in Money Supply shown below occurred in February. Figure: 1 MoM M2 Change (Seasonally Adjusted)
February was a very modest drop of -0.4%. Figure: 2 M2 Growth RatesThis is well below the February average of +6.3%. Figure: 3 Average Monthly Growth RatesNon-seasonally adjusted numbers show data through early March, with a large uptick in the most recent period. Figure: 4 MoM M2 Change (Non-Seasonally Adjusted)The weekly data below shows the activity over the last month in unadjusted money supply. You can see the big jump in the most recent week. Figure: 5 WoW M2 Change
The “Wenzel” 13-week Money SupplyThe late Robert Wenzel of Economic Policy Journal used a modified calculation to track Money Supply. He used a trailing 13-week average growth rate annualized as defined in his book The Fed Flunks. He specifically used the weekly data that was not seasonally adjusted. His analogy was that in order to know what to wear outside, he wants to know the current weather, not temperatures that have been averaged throughout the year.The objective of the 13-week average is to smooth some of the choppy data without bringing in too much history that could blind someone from seeing what’s in front of them. The 13-week average growth rate can be seen in the table below. Decelerating trends are in red and accelerating trends in green. The last three weeks have seen a deceleration in Money Supply growth. Figure: 6 WoW Trailing 13-week Average Money Supply GrowthThe plot below shows how this year compares with previous years. The 13-week average reached an all-time low back in May of last year but has been accelerating ever since, with only a modest pull-back in the current period. This could be one of the components driving the stock market higher. Record negative Money Supply growth turning positive will certainly provide a tailwind to equities. That said, compared to previous years, Money Supply growth is still well below the average. Figure: 7 Yearly 13-week Overlay

Inflation and Money Supply
The chart below shows the history of inflation, Money Supply, and Fed Funds. As shown, in 1970 inflation worked with 2 year lag compared to Money Supply. Given this, another bout of inflation may be lurking just under the surface. Figure:8 YoY M2 Change with CPI and Fed Funds

Historical Perspective
The charts below are designed to put the current trends into historical perspective. The orange bars represent annualized percentage change rather than raw dollar amount. Figure: 9 M2 with Growth RateBelow is the 13-week annualized average over history. This chart overlays the log return of the S&P. Mr. Wenzel proposed that large drops in Money Supply could be a sign of stock market pullbacks. His theory, derived from Murray Rothbard, states that when the market experiences a shrinking growth rate of Money Supply (or even negative) it can create liquidity issues in the stock market, leading to a sell-off.While not a perfect predictive tool, many of the dips in Money Supply precede market dips. Specifically, the major dips in 2002 and 2008 from +10% down to 0%. 2022 was highly correlated with a fall in Money Supply and the rebound has corresponded with the big stock market move we have seen recently.Please note the chart only shows market data through Mar 4th to align with available M2 data. Figure: 10 13-week M2 Annualized and S&P 500One other consideration is the reverse repo market at the Fed. This is a tool that allows financial institutions to swap cash for instruments on the Fed balance sheet.Reverse Repos peaked at $2.55T on Dec 30, 2022. Money has been gushing out ever since. While the Fed has been maintaining higher interest rates, this drop in reverse repos is certainly providing liquidity to the economy, driving Money Supply and the stock market higher. Figure: 11 Fed Reverse Repurchase Agreements

Wrapping Up
Money Supply can be a leading indicator and help explain the action in the stock market. Money Supply fell the entire year of 2022, bottomed in early 2023, and has been rising since. Keeping an eye on Money Supply can help one understand how much wind the stock market has at its back.Data Source: https://fred.stlouisfed.org/series/M2SL and also series WM2NS and RRPONTSYD. Historical data changes over time so numbers of future articles may not match exactly. M1 is not used because the calculation was recently changed and backdated to March 2020, distorting the graph.Data Updated: Monthly on fourth Tuesday of the month on 3-week lagMost recent data: Mar 04, 2024Interactive charts and graphs can always be found on the Exploring Finance dashboard: https://exploringfinance.shinyapps.io/USDebt/More By This Author:The End Of Japan’s Negative Interest Rates: What It Means For Gold
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