BoJ Monetary Base y/y – change in the total amount of JPY in circulation (including coins and banknotes) and on all bank accounts including the accounts of credit organizations in the country's central bank in the specified month compared to the same month of the previous year. The monetary base is used to generate the money supply.
The indicator defines the country's inflation.
This indicator reflects key macroeconomic trends in Japan and belongs to the Money sector. Its market importance is rated as low. The release provides market participants with objective information about the state of the economy. Depending on how far the actual value deviates from analysts' consensus forecasts, the report may affect the national currency and related financial instruments.
The latest official statistics were released on 03 Nov 2026. After publication, market participants compare the actual figures with forecasts and historical values. This analysis helps assess the current economic cycle and shape expectations about future monetary policy decisions, which can directly affect asset prices.
The next release is scheduled for 01 Dec 2026. Market volatility often increases around important macroeconomic releases. Traders and investors can mark the date in their calendars in advance to adjust risk management strategies, review open positions, or prepare pending orders before the official release.
"Previous" is the result from the preceding reporting period. "Forecast" is the consensus estimate before publication. "Actual" is the officially confirmed released value. Market reactions are largely driven by the difference between the forecast and the actual result. A significant positive or negative surprise relative to expectations can become a major driver of short-term price movements.
In the latest report, the actual value was -13.6%. Analysts had forecast -15.4%, while the previous reading was -15.2%. Comparing these three figures helps determine whether market expectations were met and whether the economic trend is accelerating or slowing relative to the previous period.
The analysts' consensus forecast for the upcoming release is -13.6%. The previous recorded value was -13.6%. The direction and strength of the market reaction will largely depend on how the future actual result differs from this forecast. If the data match expectations, volatility is likely to remain moderate.
The indicator has an importance level of low, which reflects its potential impact on liquidity and volatility. High-importance events can contribute to sustained medium-term trends, while lower-importance indicators more often cause localized fluctuations. Understanding the significance of a release helps traders prioritize events when planning their trading activity.
The impact is driven by changes in fundamental expectations. If actual data in Japan significantly exceed forecasts or fall well below them, the market may reassess the outlook for the national currency. This can lead to changes in capital flows and market prices. The degree of impact also depends on overall market conditions and other events occurring at the same time.
Trading immediately before important data releases involves increased risk. Spreads may widen sharply, slippage can occur, and volatility can become unpredictable when the report is published. Many professional market participants prefer to close speculative positions or reduce exposure before a release, resuming activity only after a clearer price direction emerges.
Macroeconomic data should be treated as part of a broader analysis rather than as an isolated signal. An effective approach combines assessment of the fundamental environment with technical analysis and risk management. The indicator can help confirm or challenge a trend hypothesis, but trade entries should be based on multiple factors and clearly defined risk management rules.
A limited market reaction often means that the data matched expectations and had already been priced in — an effect sometimes described as "buy the rumor, sell the fact." The impact may also be overshadowed by more important simultaneous events or broader market sentiment. In such cases, even significant indicators may be released without causing substantial price movements.
The key factor is often the size of the surprise rather than the absolute value. The larger the gap between the actual result and the forecast, the stronger the potential market reaction. A positive surprise typically supports the currency, while a negative one can weaken it. However, context matters: the market may disregard a deviation if it is viewed as temporary or insignificant for long-term central bank policy.
Historical data are useful for identifying cyclical patterns and assessing the persistence of trends. The latest release on 03 Nov 2026 provides a reference point. Comparing current readings with several previous periods can help distinguish short-term noise from structural changes in the economy and improve the quality of economic analysis.
In addition to the national currency, the indicator may affect government bonds and stock indices in Japan, as well as related commodities. The degree of impact depends on the type of data released, overall market conditions, and the sensitivity of specific assets to macroeconomic factors.
Use 01 Dec 2026 as the key date for the next publication. You can add the event to your personal calendar and set a reminder. Preparation may include reviewing consensus forecasts, identifying support and resistance levels, and planning scenarios for different release outcomes, helping reduce emotional decision-making during periods of high volatility.