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However, it is safe to say that at the peak in 1929 the number of active speculators was less - and probably was much less - than a million.

John Kenneth Galbraith (2009). “The Great Crash 1929”, p.96, Houghton Mifflin Harcourt
However, it is safe to say that at the peak in 1929 the number of active speculators was less - and probably was much less - than a million.