Estimated study time: 45 minutes
Content:
Security market indices track the performance of a group of securities representing a market, market segment, or asset class. They serve as benchmarks for portfolio performance, as the underlying for index funds and ETFs, and as economic indicators. Indices differ in their construction methodology — specifically in how securities are weighted. A price-weighted index (like the Dow Jones Industrial Average) weights each security by its price per share; a higher-priced stock has more influence on the index regardless of its market cap. A market-capitalization-weighted index (like the S&P 500) weights securities by their total market capitalization; larger companies have more influence. A float-adjusted market-cap weighted index uses only the publicly tradeable shares (excluding insider holdings and government blocks). Equal-weighted indices assign the same weight to all constituents, requiring periodic rebalancing as prices diverge.
Index construction choices have significant performance implications. Price-weighted indices are biased toward high-priced stocks regardless of company size — a stock split reduces a company's influence without any change in its economic significance. Market-cap-weighted indices give more weight to stocks that have already risen (momentum bias) and concentrate the index in large-cap stocks. Equal-weighted indices overweight small-cap stocks relative to their economic size and require more frequent, costly rebalancing. For CFA exam purposes, knowing the formula for calculating returns and weights under each method — and understanding the biases of each — is essential. Reconstitution (periodic updates to index membership) and rebalancing (resetting weights to target) are also tested concepts.
Fundamental analysis is the core approach to equity security analysis. It involves estimating the intrinsic value of a security by analyzing quantitative factors (financial statements, ratios, growth rates, cash flows) and qualitative factors (management quality, competitive positioning, industry dynamics, regulatory environment). The goal is to identify securities trading below (undervalued) or above (overvalued) intrinsic value. Top-down analysis begins with macroeconomic analysis, then moves to sector/industry analysis, and finally to individual company analysis. Bottom-up analysis focuses primarily on company-specific factors regardless of macro conditions. Most investment approaches combine both, using macro conditions to set the investment context and bottom-up analysis to select specific securities.
Technical analysis is the study of historical price and volume data to forecast future price movements. Technical analysts (chartists) believe that all relevant information is reflected in price and volume patterns, and that these patterns recur predictably due to investor psychology. Common technical tools include trend analysis, support and resistance levels, moving averages, relative strength, and chart patterns (head-and-shoulders, double top/bottom). The CFA curriculum covers technical analysis primarily to understand its assumptions and limitations from an efficient markets perspective. Technical analysis is more controversial in academic finance than fundamental analysis — the Efficient Market Hypothesis in its strong and semi-strong forms would suggest that historical price patterns cannot be used to earn excess returns. In practice, many institutional investors use quantitative technical signals as inputs to broader strategies.
Key Terms:
Quiz Questions:
Q1. An index consists of two stocks: Stock A priced at $100 and Stock B priced at $50. A standard price-weighted index would give Stock A what weight?
A) 50% B) 66.7% C) 33.3% D) Depends on market capitalization
Answer: B — Price-weighted index weight = Price of stock / Sum of all prices = $100 / ($100 + $50) = $100 / $150 = 66.7%. Stock A has twice the price of Stock B, so it has twice the influence on the index regardless of the companies' respective market capitalizations or economic importance. This is the key limitation of price-weighted indices.
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Q2. Company X has a market capitalization of $400 billion and Company Y has a market cap of $100 billion. Both are in a market-cap-weighted index with total market cap of $2,000 billion. If Company X's stock rises 10% and Company Y's stock remains flat, what is the index return?
A) 5% B) 2% C) 2.5% D) 10%
Answer: B — Company X weight = $400B / $2,000B = 20%. Company Y weight = $100B / $2,000B = 5%. Index return = 0.20 × 10% + 0.05 × 0% + rest unchanged = 2.0% from Company X alone (assuming no other changes). The market-cap weighting means Company X's 10% rise contributes 2% to the overall index, while Company Y's flat performance contributes 0%.
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Q3. An analyst using fundamental analysis estimates that a stock's intrinsic value is $75. The stock is currently trading at $60. Under a fundamental analysis framework, the appropriate action is to:
A) Sell the stock because it has fallen below $75 B) Buy the stock because it appears undervalued relative to intrinsic value C) Short the stock because the market is likely to continue driving it lower D) Take no action because the market price always reflects true value
Answer: B — Fundamental analysis aims to identify securities where market price differs from intrinsic value. A stock trading at $60 with estimated intrinsic value of $75 is undervalued by approximately 25% — the analyst should buy, expecting the market price to converge toward intrinsic value over time as other investors recognize the mispricing. The key risk is that the intrinsic value estimate is wrong.
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Q4. Which of the following index construction issues affects price-weighted indices but NOT market-cap-weighted indices?
A) Concentration in large-cap stocks B) Momentum bias toward previously outperforming stocks C) Distortion caused by stock splits that reduce a company's weight without any economic change D) Need for periodic rebalancing to maintain target weights
Answer: C — In a price-weighted index, a stock split (e.g., 2-for-1) halves the stock's share price and therefore halves its influence on the index — despite the fact that nothing has changed economically. The index divisor must be adjusted to prevent artificial index level changes. Market-cap-weighted indices are unaffected by stock splits because total market cap (price × shares) remains constant. Options A and B are issues with market-cap-weighted indices; Option D primarily affects equal-weighted indices.
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Q5. A technical analyst identifies a "head and shoulders" pattern in a stock's price chart. This pattern is traditionally interpreted as:
A) A bullish continuation pattern indicating the stock will continue its uptrend B) A reversal pattern indicating the stock's uptrend may be ending and a downtrend may begin C) A neutral pattern with no predictive value for future price direction D) A bullish reversal pattern signaling a bottom in a declining stock
Answer: B — The head and shoulders pattern is a classic bearish reversal formation consisting of three peaks — the middle peak (head) is higher than the two surrounding peaks (shoulders). The pattern signals that upward momentum is exhausting and that sellers are gaining control. A "neckline" break below the level connecting the two troughs between the head and shoulders is the traditional sell signal. The inverse head and shoulders is the bullish counterpart (a bottom reversal pattern).
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