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A put option has an inverse relationship to the underlying security. As the value of the stock increases, the value of the put decreases. Like calls, puts can be used for both hedging and speculation. Puts can be purchased in conjunction with stock ownership as a form of insurance (that is, a hedge) against downside loss on a stock. If the stock price declines, the put holder can either sell the put and keep the stock, or exercise the put and sell the stock at the put's strike price. In either case, the increased value of the option will offset the stock loss to some degree. If the stock price rises beyond a certain level, the put will expire worthless. In this case, the put holder will lose the premium paid for the option but will still participate in the upward stock movement. The break-even point occurs when the stock price advances beyond the put's strike price plus the premium. Puts also can be used speculatively without a position in the underlying security. Instead of selling a stock short, an investor who anticipates a decline in the price of a stock can buy an at-the-money put. If the stock price rises, causing the put to expire worthless, the maximum loss is the premium paid for the put. But if the stock price declines substantially, the investor could make profits that far exceed the initial cost of the put.Henry Nothnagel, Senior Vice President—Options, Wachovia Securities, Inc., Chicago, IL