Crowd sentiment as one testable decision loop

The market as a crowd

A market can be modeled as a crowd: one psychological entity whose motion is driven by shared emotion rather than by the simple sum of independent private judgments. Membership in that crowd can swamp individual cognitive assessment. That crowding-out of personal assessment is deindividuation. The operative input then becomes sentiment, the shared emotional stance toward what participants already know or expect.

Imbalance as the price mover

A supply-demand-imbalance is a mismatch between willing buyers and willing sellers, and it is treated as the immediate mover of price. A demand surplus relative to available supply is presented as the condition that lifts price. A seller surplus is presented as the condition that lowers it. Matched quantities are presented as equilibrium.

Once an imbalance moves price, that new price is treated as a reflection of the same imbalance. The link is two-way rather than one-directional.

Sentiment and information as one loop

In the completed first-stage model, sentiment drives the supply-demand-imbalance, and the imbalance is also treated as a reflection of that sentiment. Assessment of information is what generates sentiment. Sentiment is also treated as a record of already-assimilated information.

Because the last printed price is itself information, it functions as price-as-information: data that feeds later sentiment. The loop becomes a recurring process that can amplify through positive feedback.

News and the efficiency redraw

Fresh assessments and newly arriving facts are treated as news: any new fact, revision, or judgment that changes mood and enters the loop as an outside shock. That exogenous news makes the loop dynamic and allows both reinforcing and opposing feedback.

The same loop can be redrawn as a one-way absorption sequence. Under weak-efficiency, current price is assumed to contain everything implied by earlier prices. Under semi-strong-efficiency, newly published information is assumed to be absorbed into price at once and without systematic tilt. Under strong-efficiency, price is also assumed to contain relevant unpublished information.

What stays observable

Whether the model is read as psychology or as information flow, the determination that remains observable and quantifiable is price. That is offered as the reason to study price action as one procedure.

Feeling as a rule input

TradersWeek editorial: treat crowd feeling as a missing rule input rather than as market color. If shared emotion creates the imbalance that price later records, then entry, exit, and standing aside belong in one procedure written against that observable loop. They do not belong in a separate, untested change of heart.

On this editorial reading, sentiment, news, and price-as-information are inputs to the same decision process that also states when to do nothing. The archive’s remaining observable, price, is what makes that single procedure something a system can write down and review.