Stock Market Liquidity: M2 Quantity and the Priority of Household Willingness

A stock market liquidity analysis framework, arguing that the core constraint on equity markets is the investment willingness of households, not the total volume of M2. Monetary easing affects the stock market through three channels — household wealth allocation, declining risk-free rates, and improving economic fundamentals — but all three channels assume “other things being equal,” a condition that almost never holds in reality; therefore there is no perennial winner in the stock market.

The Framework As It Stands

This section is compiled from the research draft: the original framework’s structure, terminology, and key formulations are preserved, together with editorial bridging and external factual annotations; charts are drawn by the compiler following the original structure.

Core Issue

Money for stock trading can only come from households, who invest in equities using broad money (M2). The core constraint on equity markets is not “whether there is money” but “whether there is willingness” — total social M2 is approximately ¥200 trillion, theoretically enough to push the stock market to 200 times its current level, yet vast amounts are locked in fixed deposits (three- to five-year terms) and housing reserves; the real question is “of this ¥200 trillion, how much has the willingness to enter equities.”

Broad money (M2) is the liability-side record of deposits that residents hold at banks, the sole source of funds for stock trading — but the total volume is not the binding constraint.

Two underlying threads:

Underlying Thread A — The Research Divide between Equities and Bonds: Bond-market willingness is a constant (banks with money will most likely buy bonds), so bond analysts ask “is there money?”; only a small fraction of money will ever enter equities, and “whether this fraction will come and what stocks it will buy is the core research object for equity analysts.”
Underlying Thread B — Volume Is Not Entirely Without Effect, but Transmits Through the “Profit Effect”: Rising prices → more people enter the market → willingness amplifies; but many people make decisions based on trends, so when prices fall they will not buy even if there is abundant money — this is a major difficulty in equity research.

Claims

Money for stock trading can only come from households, who invest in equities using broad money (M2) (most countries prohibit banks from directly holding equities).
The core constraint on equity markets is willingness, not money: M2 of approximately ¥200 trillion is theoretically enough to push equities to 200 times their current level, but large amounts are locked in fixed deposits and housing reserves; the question is how much of the ¥200 trillion has the willingness to enter equities.
The equity-bond research divide: bond markets — willingness is constant, so the question is “is there money?”; equity markets — only a small fraction will come, so “will it come and what will it buy?” is the analyst’s core focus.
Volume is not entirely without effect; it transmits through the profit effect (rising prices → more people enter the market → willingness amplifies); trend-based decision-making is the difficulty — when prices fall, people will not buy even if money is plentiful.
“Easing” = money growing substantially above the reasonable level; it has three channels of influence on equities.
Channel 1 — Household Wealth Allocation Effect: M2 increases → proportion of wealth households can allocate to equities rises (the higher the risk appetite / the greater the wealth, the more is allocated to equities); but this is only a general rule and breaks down when stock prices fall.
Channel 2 — Decline in Risk-Free Rate: the risk-free rate is the denominator in the discounted valuation formula; easing → banks must buy bonds → bond prices rise and yields fall → risk-free rate falls → valuation rises; in practice the precise degree cannot be measured.
Channel 3 — Improvement in Economic Fundamentals: easing promotes production and operations (while simultaneously promoting bubbles) → companies improve → stocks improve.
All three channels hold only when “other variables do not change much”; in reality variables are too numerous (e.g. sudden geopolitical events), and “other things being equal” almost never exists → there is no perennial winner in equities.

Reasoning Chain

flowchart TD
  A1["Stock Trading Money Comes Only from Households · Invested via M2"] --> A2["Core Constraint = Willingness, Not Money\nM2 ≈ ¥200 trillion enough to push equities 200× but locked in fixed deposits/housing"]
  A2 --> A3["Equity-Bond Research Divide: Bonds ask 'is there money?', Equities ask 'is there willingness?'\nOnly a small fraction will ever come"]
  A3 --> A4["Volume Transmits Through Profit Effect: Rising → More People Enter\nBut trend-based decisions mean money-rich downtrends see no buying"]
  A4 --> A5["Easing (Money Growing Substantially Above Reasonable Level): Three Channels"]
  A5 --> A6["① Household Wealth Allocation (Breaks Down When Prices Fall)"]
  A5 --> A7["② Risk-Free Rate ↓ = Discount Denominator ↓ → Valuation ↑\n(Precise degree unmeasurable in practice)"]
  A5 --> A8["③ Fundamentals Improve → Companies Better → Stocks Better"]
  A6 --> A9["Three Channels Hold Only When 'Other Variables Do Not Change'\nToo Many Variables in Reality → No Perennial Winner"]
  A7 --> A9
  A8 --> A9

Key Data Anchors (course-cited values, not current)

Equity market magnitude intuition: Total social M2 approximately ¥200 trillion, theoretically enough to push the equity market to 200 times its current level — used to illustrate “money is not lacking at all; what is lacking is willingness.” (course estimate)
Bond valuation linkage (Channel 2): A bond with a face value of ¥100 rising from ¥90 to ¥95 → yield declines → risk-free rate declines → discount denominator shrinks → equity valuation rises.

⚠️ The above magnitudes are course-cited values, not current data (course framing); for current stock market liquidity judgments, current official M2 and interest rate data must be used.

Application Scenarios (Judging Stock Market Liquidity: Watch Willingness, Not M2 Volume)

Suggested operational steps from this framework:

Set the anchor first: stock market capital can only come from household M2, but the binding constraint is willingness, not total volume — do not directly infer equity gains from “M2 has grown again.”
Judge willingness (main variable): will this pool of money come, and what will it buy? The core driver is the profit effect (is there an upward trend drawing people in?); when the trend points down, plentiful money still does not produce entry.

Run through the three easing channels (auxiliary, with limitations):

Channel	Mechanism	Direction	Limitation
① Household wealth allocation	M2 ↑ → proportion of wealth allocatable to equities ↑	Bullish bias	Only a general rule; breaks down when prices fall
② Risk-free rate ↓	Easing → banks must buy bonds → bond prices ↑ yields ↓ → valuation ↑	Bullish bias	Precise degree unmeasurable in practice
③ Fundamentals improve	Easing promotes production and operations → companies improve → stocks improve (also promotes bubbles)	Bullish bias	—

Always note the limitations: the three channels hold only when “other variables do not change much”; in reality variables are too numerous, and “other things being equal” almost never holds → give a direction, not a price level; there is no perennial winner in equities.

Compiler’s Perspective

Coordinates: Category = Monetary System and Circulation · axis_h = Fa (Method) · axis_v = Why It Is So

The Bridging Layer

This framework completely bifurcates the first question asked in equity vs. bond analysis: bonds ask “is there money?”; equities ask “is there willingness to come?” — the two are not the same question, and applying bond-market logic to equities is a high-frequency error.

Those operating on conflated logic will interpret rising M2 growth directly as a necessary condition for equity gains. The concrete counterexample the framework provides: even though total social M2 is approximately ¥200 trillion and theoretically sufficient to push equities to 200 times their current level, large amounts of capital remain locked in three- to five-year fixed deposits and housing reserves; once the trend points down and the profit effect disappears, even abundant M2 cannot generate the willingness to enter the market — “when prices fall, people will not buy even if there is money.” This is the major difficulty of equity research and the core erroneous action this framework specifically names. All three channels (household wealth allocation / declining risk-free rate / improving fundamentals) hold individually only under the assumption of “other things being equal” — “risk-free rate declines → discount denominator shrinks → valuation rises” is a chain whose precise degree in practice cannot be measured; the first channel breaks down outright when prices fall; stacking all three gives direction only, never a price level.

Exclusive claim: Analysts who forecast “M2 growth → equity gains” are in effect de-conditionalizing under the threefold stacked assumption of “other things being equal”; the irreplaceable increment of this entry is stripping those three preconditions out of the conclusion one by one, so that the analyst can see precisely which link in the assumption chain they are betting on, rather than accepting a total directional call that cannot be falsified.

Source

Compiler’s draft z-0186 · archived 2026-07
Conceptual support: lesson 11-14 (liquidity = capital + willingness)

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