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53) If the daily returns on the stock market are normally distributed with a mean of .05% and a
standard deviation of 1%, the probability that the stock market would have a return of -23% or
worse on one particular day (as it did on Black Monday) is approximately ________.
A) .0%
B) .1%
C) 1%
D) 10%
Answer: A
Explanation: Prob = 1 – N[(-.2300 – .0005)/.01] ≈ 0
Difficulty: 3 Hard
Topic: Random Walks and the Efficient Market Hypothesis
Learning Objective: 08-01 Demonstrate why security price changes should be essentially
unpredictable in an efficient market.
Bloom’s: Remember
AACSB: Analytical Thinking
Accessibility: Keyboard Navigation
54) According to the semistrong form of the efficient markets hypothesis, ________.
A) stock prices do not rapidly adjust to new information
B) future changes in stock prices cannot be predicted from any information that is publicly
available
C) corporate insiders should have no better investment performance than other investors even if
allowed to trade freely
D) arbitrage between futures and cash markets should not produce extraordinary profits