A probabilistic investment model is formulated as a Wiener process with a barrier. A planning horizon, targeted rate of return, discount rate, and the mean and variance rate of return are the important parameters in the model. Sensitivity analyses are studied. Several significant statements can...

Using the South African divestment case, this study tests the hypothesis that social pressure affects stock returns. Both short-run (3-, 11-, and 77-day periods) and long-run (13-month periods) tests of stock returns surrounding U.S. corporate announcements of decisions to stay or leave South...