      One such variable is the institutional program trading of baskets ofequities, which can cause rapid price swings. Because program trading isusually initiated at specific price levels, many firms often initiateprogram trades within seconds of one another. This type of computerizedbuying and selling of baskets of equities can overwhelm the aforementioneddirectional buying and selling of particular equities. In addition toinstitutional program trading, the introduction of individual Day Tradershas created an environment of whipsawing price patterns.