Measurement shows that almost one-half of all market days are down days and slightly more are up days, but close enough to think of it as 50/50. Just as the probability of getting a long string of ...

A regular traveler is planning an overseas trip but hasn't purchased her plane ticket. So she visits various websites that can predict whether the cost of her ticket will rise or fall. Two sites say ...

Despite the widespread realization that risk measures depend critically on the underlying probability measure, most risk measures are based on single probability measures – asset price probabilities ...