Just when a new bull market in a category of investments (stocks or commodities, etc.) is percolating to the top, investors may still be immersed in the psychology of investing in the previous bull market's most favored investment. As the maturing trend dies out, investors may still try to find reasons to invest in that trend, even though it may be actually reversing, with some investors playing yesterday's game. This may happen just when the long-term trend for the mature trend may have turned down.