Which of the following most appears to contradict the proposition that the stock market is weakly efficient?

Question:

Which of the following most appears to contradict the proposition that the stock market is weakly efficient? Explain.

a. Over 25% of mutual funds outperform the market on average.

b. Insiders earn abnormal trading profits.

c. Every January, the stock market earns abnormal returns.

Mutual Funds
Mutual funds are like a pool of funds gathered by different small investors that have simalar investment perspective about returns on their investments. These funds are managed by professional investment managers who act smartly on behalf of the...