Unit 4: Investor sentiment and corporate finance
Behavioural Finance notes · PTU syllabus (MBA 913-18)
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Unit summary
Investor sentiment moves prices and influences how companies make financial decisions. This unit covers a model of investor sentiment, market efficiency and biases in brokerage recommendations, evidence on cross-sectional variation in stock returns, and behavioural corporate finance.
After this unit you can
- Explain a model of investor sentiment
- Explain biases in brokerage recommendations
- Explain evidence on cross-sectional stock return variation
- Explain behavioural corporate finance
PTU syllabus topics
- Model of investor sentiment
- market efficiency and biases in brokerage recommendations
- evidence on cross-sectional stock return variation
- behavioural corporate finance
- 1Displacement
New technology or story
- 2Boom
Prices rise, attention grows
- 3Euphoria
Speculation, 'this time is different'
- 4Profit-taking
Smart money sells
- 5Panic
Prices crash
Topic 1
A model of investor sentiment
- Barberis, Shleifer and Vishny (1998): investors suffer from conservatism (under-react to new information) and representativeness (over-react to a series of similar news, seeing patterns), producing short-term momentum and long-term reversal.
- Daniel, Hirshleifer and Subrahmanyam (1998): overconfidence and self-attribution bias create over-reaction to private information.
- Measures of sentiment: investor surveys, mutual fund flows, IPO volume and first-day returns, put–call ratio, volatility index (India VIX), closed-end fund discounts, Baker–Wurgler sentiment index.
- Effect: sentiment affects hard-to-value and hard-to-arbitrage stocks (small, young, volatile) the most.
Topic 2
Market efficiency and biases in brokerage recommendations
- Optimism bias: analysts issue far more buy than sell recommendations.
- Sources: investment-banking relationships, access to management, trading commissions, herding with other analysts, career concerns, anchoring on past forecasts.
- Evidence: analyst forecasts are on average over-optimistic; markets partly discount this; investors who follow recommendations blindly can lose.
- Regulation: SEBI Research Analysts Regulations require disclosure of conflicts, separation from investment banking and no trading against recommendations.
Topic 3
Cross-sectional variation in stock returns
- Fama–French three-factor model (1993): returns explained by market, size (SMB — small minus big) and value (HML — high minus low book-to-market); later extended to five factors (profitability and investment) and with momentum (Carhart).
- Rational view: factors are risk premiums. Behavioural view: they reflect systematic mispricing from biases and sentiment.
- Other patterns: low-volatility anomaly, accruals anomaly, net issuance (firms issuing equity underperform).
Topic 4
Behavioural corporate finance
Irrational investors, rational managers
Managers time markets — issue equity when overvalued, buy back when undervalued; cater to dividend demand
Rational investors, irrational managers
Overconfident and optimistic managers over-invest, overpay in acquisitions, use too much debt
- Market timing: equity issues cluster when valuations are high; firms' capital structures reflect past attempts to time markets (Baker and Wurgler).
- Catering theory of dividends: managers pay dividends when investors place a premium on payers.
- Managerial overconfidence: linked to value-destroying acquisitions (hubris hypothesis — Roll, 1986) and excessive investment.
- Implications: independent boards, disciplined capital allocation, decision checklists and pre-mortems.
Key terms
- Investor sentiment
- Beliefs about future returns not justified by facts
- Conservatism bias
- Slow updating of beliefs to new evidence
- Optimism bias
- Tendency of analysts to issue favourable forecasts
- Three-factor model
- Market, size and value factors explaining returns
- Hubris hypothesis
- Overconfident managers overpay in acquisitions
Quick revision
- BSV and DHS sentiment models; sentiment measures.
- Analyst optimism and conflicts; SEBI regulation.
- Fama–French factors; rational vs behavioural interpretation.
- Behavioural corporate finance: market timing, catering, overconfidence, hubris.
Important exam questions
Practice questions written to the PTU exam pattern for this unit's syllabus: short answers (Section A style) and long answers (Sections B and C style).
Short-answer questions
- Q1.What is investor sentiment?
- Q2.How does conservatism lead to momentum?
- Q3.Why are brokerage recommendations biased?
- Q4.Name the Fama–French three factors.
- Q5.What is the catering theory of dividends?
- Q6.What is the hubris hypothesis?
Long-answer questions
- Q1.Explain a model of investor sentiment and how sentiment is measured.
- Q2.Discuss biases in brokerage recommendations and market efficiency.
- Q3.Explain evidence on cross-sectional variation in stock returns.
- Q4.Explain behavioural corporate finance with examples.
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