In probability theory, a martingale is a stochastic process (i.e., a sequence of random variables) such that the conditional expected value of an observation at some time t, given ...
Originally, martingale referred to a class of betting strategies popular in 18th century France. The simplest of these strategies was designed for a game in which the gambler wins ...
Thinking Out Loud. Few people talk about the full cost of trading. Typically, managers and clients measure the cost of transactions – trades actually made – but ignore the ...