Are markets truly efficient

I need at least 3pages, including reference.(at least 3 reference) I hope you don’t let me down, and you can finish it on time. In addition, I don’t need what you write from the network, so please use your own word to express it. Thank you

At the time of expression, please give me some example to state your expression.

This class use book investments 11th edition

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Market efficiency refers to the level or degree in which the stock prices in a market will reflect on the available information. The theory supporting market efficiency suggests that the stock market will always react promptly to the relevant information in the market which is a………………………..