Explain whether you agree or disagree with the following statement: "The stock market is efficient."

Your post must be substantial. To be considered substantial, your post must directly address the requirement / prompt / discussion question, it must include at least one reference and it must span a minimum of two paragraphs. The emphasis is, not on length, but rather on the clear communication of an intelligently formulated idea, supported by research and relevant examples. If you could list sources that would be great so I could review the material.