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Valuation should start from book value and current earnings, which are measured under accounting rules, not from forecasts. Speculative value is added only in increments the investor can defend. This separates what you know from what you are guessing, so a price that rests mostly on guesses is visible as such.
Equity value equals current book value plus the present value of expected residual earnings, which are earnings minus a charge for the required return on book value. Only earnings above that required return add value beyond book. Value therefore comes from forecasting profitability relative to the capital employed, not from forecasting growth alone.
Instead of computing an intrinsic value from an estimated discount rate and forecasts, take the market price as given and solve for the growth rate or expected return it implies. The investor then asks whether that implied growth is plausible given the accounts. This turns valuation from estimating an unknowable number into testing whether the market's bet is defensible.
Accounting under conservatism and the realization principle defers earnings recognition when outcomes are uncertain, so expected earnings growth often reflects risk rather than added value. Higher forecast growth should therefore be treated with suspicion rather than simply capitalized.
GAAP's reliability tests, historical cost, and the rule that revenue is recognized only when earned act as a filter that keeps speculation out of the balance sheet. Penman treats these conservative conventions as features for valuation, not flaws. The accounts separate verified value from hoped-for value that the investor must justify independently.
DCF models put most of the value in a terminal value far in the future, because free cash flow is often negative for investing, growing firms. The valuation then rests on the least knowable numbers, and cash flow is a poor measure of value added in a period. Accrual earnings match value added to the period more closely and lessen dependence on distant speculation.