as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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why is the volume highest at the beginning and end of a trading day?
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one of the fundamental of technical analysis suggests that holding a security overnight represents a huge commitment.  therefore it would follow that traders would tend to close their positions prior to market close and open them when it opens.
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