Monash University · S1 2026 · FACULTY OF BUSINESS & ECONOMICS

BFC2140 · Corporate Finance

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Chapter 11 of 11 · BFC2140

Market Efficiency & Payout Policy

The unit closes with two big-picture financing questions: how well do prices reflect information, and how should a firm return cash to shareholders? This chapter covers the Efficient Market Hypothesis (weak, semi-strong and strong forms), dividend-policy theories (irrelevance, tax preference, agency), the choice between dividends and share repurchases, and the Australian classical-versus-imputation (franking-credit) tax systems with dividend tax calculations. It is examined as Section B numerical dividend-tax questions and Section C reasoning about the forms of market efficiency and the determinants of payout policy.

In this chapter

What this chapter covers

01The Efficient Market Hypothesis: prices fully reflect available information
02The three forms — weak (price/volume history), semi-strong (all public info), strong (incl. insider info)
03Why strong ⊃ semi-strong ⊃ weak, and what each form implies for trading strategies
04Dividend irrelevance (MM, perfect markets) versus real-world payout drivers
05Tax-preference and agency arguments for low or high payout
06Dividends versus share repurchases as ways to return cash
07Classical versus imputation (franking) tax systems
08Computing the tax owed on franked dividends under each system

Worked example · free

Tax on a franked dividend under the imputation system

Q [5 marks]. An Australian investor receives a fully franked cash dividend of $700, franked at the 30% company tax rate. The investor's marginal personal tax rate is 37%. Under the dividend imputation system, (a) gross up the dividend to find the franking credit and taxable amount, and (b) compute the net additional personal tax payable on the dividend. Give dollar amounts to two decimal places.

1 markCompute the franking credit attached to the dividend: credit = cash dividend × [company tax rate/(1 − company tax rate)] = 700 × (0.30/0.70) = 700 × 0.428571 = $300.00.
1 markGross up the dividend to the taxable amount (cash dividend plus franking credit): taxable income = 700 + 300 = $1,000.00. This is the pre-company-tax profit the dividend represents.
1 markApply the investor's marginal rate to the grossed-up amount: gross personal tax = 37% × 1,000 = $370.00.
1 markSubtract the franking credit, which the imputation system allows as an offset for company tax already paid: net tax payable = 370 − 300 = $70.00.
1 markInterpret: the investor pays only $70 of extra tax (the gap between the 37% personal rate and the 30% company rate already paid), versus $259 (37% of $700) under a classical system that ignores the company tax — so imputation removes the double taxation of dividends.

Franking credit = $300.00, grossed-up taxable amount = $1,000.00, net personal tax payable = $70.00. The imputation system credits the 30% company tax already paid, so the shareholder pays only the difference up to their own marginal rate.

Sia tip — The two-step trap in franking questions is to forget to gross up: you must add the franking credit to the cash dividend before applying the personal rate, then subtract the credit at the end. Under a classical system there is no credit and no grossing up — the cash dividend is simply taxed again in the investor's hands, which is the double-taxation imputation is designed to remove.

Glossary

Key terms

Efficient Market Hypothesis (EMH): The proposition that asset prices fully and rapidly reflect available information, so prices are 'fair' and consistently beating the market through that information is not possible. It comes in three forms defined by the information set considered.
Weak / semi-strong / strong form: Weak form: prices reflect all past price and volume data (so technical analysis cannot earn excess returns). Semi-strong: prices reflect all public information (so fundamental analysis on public data cannot either). Strong: prices reflect all information including insider information. The forms nest: strong implies semi-strong implies weak.
Dividend irrelevance (MM): In a perfect market, the firm's payout policy does not affect its value — shareholders can create their own desired cash flow (homemade dividends) by selling shares, so they are indifferent between dividends and capital gains. Market frictions (taxes, agency, signalling) make payout matter in practice.
Share repurchase: Returning cash to shareholders by buying back shares instead of paying a dividend. It reduces the share count (raising EPS and price per share) and can be more tax-efficient for some investors, offering flexibility a regular dividend lacks.
Classical vs imputation tax system: Under a classical system company profits are taxed at the corporate level and again as dividends in shareholders' hands (double taxation). Under Australia's imputation system, franking credits pass the company tax already paid to shareholders, who offset it against personal tax, removing the double taxation.
Franking credit: A credit for company tax already paid, attached to a franked dividend. The shareholder grosses up the cash dividend by the credit, is taxed on the total at their marginal rate, then deducts the credit — so they pay only the difference between their own rate and the company rate (and may receive a refund if their rate is lower).

FAQ

Market Efficiency & Payout Policy FAQ

What are the three forms of market efficiency?

They are defined by the information already in prices. Weak-form efficiency means prices reflect all past price and trading-volume data, so technical analysis cannot consistently earn excess returns and prices follow a random walk. Semi-strong efficiency means prices reflect all publicly available information (financial statements, news, announcements), so analysing public data cannot beat the market once costs are considered. Strong-form efficiency means prices reflect all information including private/insider information. The forms are nested — strong implies semi-strong implies weak — and most evidence supports weak and semi-strong efficiency more than strong.

Does dividend policy affect firm value?

In a perfect market, no — Miller and Modigliani showed payout is irrelevant because shareholders can manufacture any cash-flow pattern they want by buying or selling shares (homemade dividends), so they do not value a particular payout policy. In the real world, frictions make payout matter: personal taxes (which may favour low payout or capital gains, or in Australia franked dividends), agency considerations (paying out free cash flow disciplines managers), signalling (a dividend increase can signal confidence), and clientele effects (different investors prefer different payouts). So dividend policy is irrelevant in theory but relevant in practice for these specific reasons.

How is the imputation system different from a classical system?

Under a classical system, company profits are taxed at the company level and the resulting dividends are taxed again in shareholders' hands, so the same profit is taxed twice. Under Australia's dividend imputation system, the company tax paid is 'imputed' to shareholders via franking credits: the shareholder grosses up the cash dividend by the credit, is taxed at their marginal rate on the grossed-up amount, and then offsets the franking credit. The net effect is that the profit is ultimately taxed only at the shareholder's marginal rate, eliminating the double taxation — and a shareholder whose marginal rate is below the company rate can even receive a refund of excess credits.

When might a firm prefer a share repurchase to a dividend?

Repurchases offer flexibility and potential tax advantages. Unlike a regular dividend, which the market expects to be maintained, a buyback is a one-off that does not commit the firm to future payouts, so it suits distributing temporary surplus cash. It can be more tax-efficient for shareholders who would rather realise a capital gain than receive taxable dividend income, and by reducing the share count it raises earnings and value per remaining share. Firms may also repurchase when they believe their shares are under-priced. The choice between dividends and repurchases is part of the broader payout-policy decision.

How is this chapter examined in BFC2140?

It is the Week 12 topic and is examinable on the final (Weeks 5-12 are emphasised). Expect Section B numerical questions on dividend tax — grossing up a franked dividend and computing the net tax under the imputation system (and comparing with a classical system) — and Section C reasoning about the three forms of the EMH, dividend-policy theories (irrelevance, tax preference, agency), and dividends versus repurchases. Dividend tax under imputation/franking is flagged among the high-yield recurring exam skills.

Study strategy

Exam move

Split your revision between the conceptual (EMH and payout theory) and the computational (dividend tax). For the EMH, memorise the three nested forms and what each rules out — weak rules out technical analysis, semi-strong rules out public-information fundamental analysis, strong rules out even insider trading — and be ready to relate a stated trading strategy to the form it would have to violate. For payout policy, learn the irrelevance result and then the specific frictions that make payout matter (taxes, agency, signalling, clienteles), and be able to compare dividends with share repurchases. For the numerical side, drill the franking calculation as a fixed routine: compute the credit, gross up, apply the personal rate, deduct the credit, and contrast with the classical double-taxation outcome. Because this is the last content topic and the final emphasises Weeks 5-12, give it full revision weight rather than treating it as an afterthought.

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