Given these facts, it's no surprise to hear that mutual funds have seen lots of money flowing in and out of their coffers in recent months. One week in November 2008, Wall Street staged a bit of a rally, and investors put $10.4 billion more into mutual funds than they took out. But the next week, fortunes reversed once again, and $12 billion flowed out of the stock mutual fund industry.Usually, when that happens, the money moves over to bond funds, because they're supposed to rise when stocks fall, and vice versa. Not this time, however. Bond funds mirrored the stock mutual funds exactly, just on a slightly smaller scale. These days, investors don't seem to trust either stock or bonds any further than they can throw them. It's almost as if they're suggesting that it's better to stuff that cash into your mattress, or maybe an FDIC-insured savings account.