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Stocks & Commodities V. 25:2 (44-48): Sidebar: Models of stock price behavior by Radha Panini

Stocks & Commodities V. 25:2 (44-48): Sidebar: Models of stock price behavior by Radha Panini

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Stocks & Commodities V. 25:2 (44-48): Sidebar: Models of stock price behavior by Radha Panini

MODELS OF STOCK PRICE BEHAVIOR

1. Brownian model (BM)

St = S0 + t + Wt

where St is the stock price at time t, S0 is the stock price at time 0, , and are constants and Wt is a Brownian motion. Since Wt can take negative values, it is possible for stock prices to be negative!
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