Economists, such as Milton Friedman , have argued that speculators ultimately are a stabilizing influence on the market, and that stabilizing speculation performs the important function of providing a market for hedgers and transferring risk from those people who don't wish to bear it, to those who do. Controversy about currency speculators and their effect on currency devaluations and national economies recurs regularly. An Introduction to Mathematical Finance with Applications: For shorter time frames less than a few days , algorithms can be devised to predict prices.
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