Final answer:
The profusion of stock in the 1920s was fueled by a surge in demand driven by rising stock prices and speculative investments made with borrowed money.
Explanation:
Profusion of stock in the 1920s was driven by a combination of factors. One key reason was the unprecedented rise in stock prices during this era, fueled by a mix of genuine corporate profits and speculative investments made with borrowed money. As more and more speculators joined the market, the demand for stocks surged, leading to a proliferation in stock trading.
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