What gold and platinum are telling us about the stock market’s direction

Gold and platinum, two of the world’s most closely watched precious metals, have long served as barometers of the global economy. Their prices move in response to shifts in monetary policy, geopolitical tension, and investor risk appetite. What has recently attracted attention is the ratio of gold to platinum – a simple calculation that, according to a range of back‑tests, has proven to be one of the most reliable leading indicators of a stock market’s performance over the following twelve months.

Throughout the past two and a half centuries, researchers tracking the Turnbull‑Cobb index and other long‑term market benchmarks have found that periods when the gold‑to‑platinum ratio rises above a historically established threshold are often followed by a decline in equity markets. Conversely, when the ratio falls below that threshold, the stock market tends to rally. The ratio’s predictive power has been documented in several independent studies, and its correlation appears to hold even as market structures evolve and new funds enter the space. The statistical quality of the signal – measured in terms of out‑of‑sample accuracy – compares favourably with more complex macro‑economic models.