Consider that the Brownian model of financial markets was discovered by Bachelier in 1900, five years before Einstein, and the pace of financial innovation in t

Consider that the Brownian model of financial markets was discovered by Bachelier in 1900, five years before Einstein, and the pace of financial innovation in the intervening century, and you have your answer for why finance is complex. [1]: https://en.wikipedia.org/wiki/Louis_Bachelier https://en.wikipedia.org/wiki/Louis_Bachelier