When Stocks and Gold Stop Moving Together
The Real Numbers | Home Economics Journal
A Bayesian analysis of the equity-commodity split, December 2022 to March 2026
Stocks and gold used to rise and fall together. When the stock market had a good year, gold had a good year too. That relationship held consistently from late 2022 through late 2024. Then, starting in early 2025, the two markets separated. Stocks kept struggling while gold kept climbing. By March 2026, gold's annual gain was nearly double the stock market's annual gain.
That separation is unusual, and it tells us something important. The same forces that push stocks up are no longer the same forces that push gold up. For anyone with savings, a retirement account, or just curiosity about where the economy is headed, understanding that split is one of the most useful things you can know right now.
The analysis below measures that split precisely, tracks when it started, and uses a statistical method called Bayesian updating to show how confident we can be in what we found.
Key numbers
| Relationship before Dec 2024 | Beta +1.03 | R² = 0.77. Stocks and gold moved as one. |
| Relationship after Dec 2024 | Beta -0.36 | R² = 0.04. The relationship flipped. |
| When the split started | March 2025 | Gold's annual gain crossed above the stock market's and stayed there. |
| Gold annual gain at March 2026 | +$1,645/oz | vs. +$823 for the S&P 500 in index points. |
| Gold/stocks ratio at March 2026 | 2.00 | Gold runs at twice the annual pace of stocks. |
The method
The analysis uses one operator applied to every market in the study:
Y_t = P_t minus P_{t minus 52 weeks}
Y_t is the 52-week absolute difference in price. It is not a percentage return. It is not an index. It measures how much the price changed over the prior year, taken at each quarterly close from December 2022 through March 2026. The baseline window covers December 2023 through September 2024. The test window covers December 2024 through March 2026.
The 50-year context
The chart below shows the annual gain for stocks and gold at every year from 1976 to 2026. Five economic eras are shaded: the inflation era, the great moderation, the lost decade, the QE era, and the current period. The current era shows gold's largest absolute annual gain in the 50-year record.
The great moderation era (1983-1999) was the clearest period of stock dominance in the 50-year record. The gold/stocks ratio averaged 0.55. During the lost decade (2000-2009), gold recovered but stocks were still roughly in step. The current era is different. Gold runs at a ratio not seen since the 1970s inflation crisis.
The finding in plain terms
From late 2022 through late 2024, stocks and gold shared a driver. When one rose over a 12-month window, the other rose too. The relationship was tight. The proportionality coefficient was +1.03 with an R² of 0.77, meaning the two markets explained 77% of each other's annual behavior.
That changed in early 2025. The coefficient dropped to -0.36 and the R² collapsed to 0.04. The two markets no longer explain each other at all. The scatter chart below shows the split clearly. Each point is one quarter. Blue points climb together in the baseline. Orange points show no pattern in the test window.
Gold's annual gain crossed above the stock market's annual gain in March 2025 and the ratio stayed above 1.0 for every quarter that followed. The chart below tracks that crossing year by year across the full 50-year record. Orange bars are gold years. Blue bars are stocks years.
What the Bayesian analysis adds
Bayesian updating is a method for revising a belief when new evidence arrives. You start with a prior: what you expected before seeing the new data. You observe new data. You update your belief in proportion to how surprising that data is relative to your prior. The result is a posterior: your revised belief.
The prior sits near beta = 1.03, built from four quarters of baseline evidence where stocks and gold moved together. The test data pushes toward beta = -0.36. The posterior lands near 0.79 because six quarters of test data does not fully override a well-established prior. The Bayes Factor of 1.13 says the evidence for a true shift is real and directional. Every new quarter of data that confirms the pattern will raise the confidence level further.
A Bayes Factor of 1.13 is honest. It does not overstate the case. With only six test observations, the analysis cannot claim certainty. What it says is that the direction of the shift is clear, the magnitude is large, and every additional quarter of confirming data raises the confidence level.
Five eras, one pattern
The current era is not without precedent. The chart below shows the average gold/stocks ratio for each of the five economic eras in the 50-year record. The current ratio of 1.71 matches the inflation era of the 1970s. That is the last time gold sustained this kind of lead over stocks.
Why this matters
When stocks and gold move together, they share a common economic driver — usually the overall health of the economy. When they move apart, it signals that investors see two different economic realities at the same time. One where corporate earnings justify stock prices, and a separate one where uncertainty or inflation makes hard assets more attractive.
That split is not a normal condition. The great moderation lasted 17 years and stocks led the whole way. The current decoupling is 15 months old. Whether it extends into a full era or reconnects depends on what happens to the variables that drove it: inflation expectations, dollar reserve system pressure, and the conflict cluster driving commodity prices.
Watch the quarterly data. Every new reading updates the Bayesian posterior. The Bayes Factor will rise if the pattern holds. It will fall if stocks and gold reconnect. That is the discipline the framework provides — not a prediction, but a structured way to update your view as evidence arrives.
The framework does not tell you what happens next. It tells you how to update when the next quarter of data comes in.
Sources
S&P 500 | historical index prices, Yahoo Finance and FRED
Gold spot price | OnlyGold and USAGOLD historical data
Bayesian proportionality framework | developed by Home Economics LLC
Data window | December 2022 through March 27, 2026
This article is part of the Home Economics Journal published by Breadcoins. It does not constitute investment advice. The framework presented is analytical, not predictive.