In order to test the semistrong form of the efficient-market hypothesis, researchers have mostly relied on the:. a. estimation of the serial correlation coefficients (autocorrelations) for securities and markets.
b. measurement of the performance of technical trading strategies over the years.
c. measurement of how rapidly security prices adjust to different news items.
d. All of the options.

Faldo corp sells on terms that allow customers 45 days to pay for merchandise. its sales last year were $325,000, and its year-end receivables were $60,000. if its dso is less than the 45-day credit period, then customers are paying on time. otherwise, they are paying late. by how much are customers paying early or late? base your answer on this equation: dso - credit period = days early or late, and use a 365-day year when calculating the dso. a positive answer indicates late payments, while a negative answer indicates early payments.a. 21.27b. 22.38c. 23.50d. 24.68e. 25.91b