USA Today writes: "The time it takes to read this sentence is all it takes for nearly 2 million stock trades to flash through the stock market.
Most of those trades aren't coming from trigger-happy day traders and mutual fund managers with billions of dollars at their disposal. It's a flood of machine-gun speed fury coming from an army of computers programmed to obey complicated algorithms that are hyperactively buying and selling.
What does that mean to you, the individual investor? The next time you buy or sell a stock, forget the quaint idea that there is a living, breathing human being on the other side of the transaction. You're trading with a computer."