Burton Gordon Malkiel (born August 28, 1932) is an American economist and writer, most famous for his classic finance book A Random Walk Down Wall Street (now in its 12th edition, 2015). He is a leading proponent of the efficient-market hypothesis, which contends that prices of publicly traded assets reflect all publicly available information, although he has also pointed out that some markets are evidently inefficient, exhibiting signs of non-random walk.
