Evolutionary disruption of S&P 500 trading concentration: An intriguing tale of a financial innovation.

PLoS One · 2020 · PMC7092977 · PMID 32208426

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an increasing trendno p-value reported

The phenomenon of an increasing trend in the concentration of daily trading volumes (in number of shares traded) for the period 1962–2005 was first rigorously documented in Balakrishnan, et al [ 1 ].

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