Entraînement aux concepts de ce débat

Which historical period is cited by proponents as an era where high market concentration yielded approximately 20% annual returns despite broader economic challenges?

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• A.The Dot-com bubble
• B.The Great Depression
• C.The Nifty Fifty era
• D.The Gold Standard era

According to the concentration thesis, which two historical market events represent the only major exceptions to the rule that top-heavy phases deliver strong gains?

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• A.The 1929 Crash and the 2000 Dot-com bust
• B.The 2008 Financial Crisis and the 2020 COVID crash
• C.The 1970s Stagflation and 1987 Black Monday
• D.The 1997 Asian Financial Crisis and 1998 LTCM collapse

Critics argue the 23% annual gain claim fails historically by pointing to the 2010-2020 high concentration period. What annualized return did this specific decade actually yield?

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• A.Approximately 23%
• B.Approximately 13.6%
• C.Approximately 7%
• D.Approximately 2%

Under Modern Portfolio Theory (Markowitz 1952), which specific market condition is most likely to break the model by reducing the effective number of independent bets?

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• A.High market volatility
• B.Perfect negative correlation
• C.Increased algorithmic high-frequency trading
• D.High positive correlation among asset returns

According to Positive Feedback Trading (De Long, Shleifer, Summers, Waldmann 1990), how do rational speculators destabilize prices rather than correcting them toward fundamentals?

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• A.By anticipating the actions of noise traders and buying ahead of them to ride the bubble.
• B.By panicking and selling off assets at the first sign of a market downturn.
• C.By short-selling overvalued assets to force prices immediately back to fundamental value.
• D.By utilizing high leverage to exploit tiny arbitrage opportunities in currency markets.

The Superstar Firm Hypothesis (Autor, Dorn, Katz, Patterson, Van Reenen 2017) assumes that market dominance is driven by which specific combination of cost structures?

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• A.Predatory pricing and massive lobbying expenditures.
• B.High marginal costs and low fixed costs.
• C.High fixed costs and low marginal costs.
• D.The transition from manufacturing to service-based economies.

If massive AI capex creates winner-take-most dynamics in the tech sector, which specific structural advantage allows these dominant firms to expand their market share exponentially?

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• A.The ability to hire all the best software engineers to prevent competitors from innovating.
• B.Data network effects.
• C.Diseconomies of scale.
• D.Access to offshore tax havens to minimize corporate tax liabilities.

How would aggressive antitrust scrutiny targeting large technology companies most directly disrupt the earnings dominance predicted by the Superstar Firm Hypothesis?

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• A.By imposing massive one-time fines that bankrupt the companies overnight.
• B.By subsidizing smaller competitors to ensure they have higher profit margins than the superstar firms.
• C.By requiring these companies to unionize their workforce and increase minimum wages.
• D.By forcing the breakup of monopolistic platforms or restricting acquisitions.

While Positive Feedback Trading (De Long, Shleifer, Summers, Waldmann 1990) blames rational speculators for destabilizing prices, the Overreaction Hypothesis (De Bondt & Thaler 1985) attributes extreme price movements to what?

• A.The cognitive biases of ordinary investors who disproportionately weigh recent news and ignore long-term historical averages.
• B.The deliberate market manipulation by central banks controlling interest rates.
• C.The perfectly rational processing of new information by all market participants.
• D.The structural limitations of trading algorithms executing stop-loss orders.

Modern Portfolio Theory (Markowitz 1952) assumes diversified risk reduction, whereas the Superstar Firm Hypothesis (Autor, Dorn, Katz, Patterson, Van Reenen 2017) implies index returns will increasingly depend on what factor?

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• A.The overall health of small-cap companies which drive the majority of job creation.
• B.The perfect equal-weighting of all firms in the market to eliminate stock-specific risk.
• C.The idiosyncratic performance of a tiny handful of hyper-productive, dominant companies.
• D.The fluctuation of global commodity prices and foreign exchange rates.