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240 Part II: Call Option Strategies
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by the underlying stock. If such a rally occurred, he could make unlimited profits on
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the long side. If it did not, he loses nothing.
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Example: Assume that the same spread was established as in the last example. Then,
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if XYZ is at or below 31 ½ at April expiration, the April 30 call can be purchased for
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1 ½ points or less. Since the call was originally sold for 3, this would represent a prof
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it of at least 1 ½ points on the April 30 call. This profit on the near-term option cov
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ers the entire cost of the July 35. Consequently, the strategist owns the July 35 for
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free. If XYZ never rallies above 35, he would make nothing from the overall trade.
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However, if XYZ were to rally above 35 after April expiration (but before July expi
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ration, of course), he could make potentially large profits. Thus, when one establish
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es a diagonal spread for a credit, there is always the potential that he could own a call
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for free. That is, the profits from the sale of the near-term call could equal or exceed
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the original cost of the long call. This is, of course, a desirable position to be in, for if
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the underlying stock should rally substantially after profits are realized on the short
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side, large profits could accrue.
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DIAGONAL BACKSPREADS
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In an analogous strategy, one might buy more than one longer-term call against the
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short-term call that is sold. Using the foregoing prices, one might sell the April 30 for
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3 points and buy 2 July 35's at 1 ½ points each. This would be an even money spread.
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. The credits equal the debits when the position is established. If the April 30 call
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expires worthless, which would happen if the stock was below 30 in April, the spread
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er would own 2 July 35 calls for free. Even if the April 30 does not expire totally
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worthless, but if some profit can be made on the sale of it, the July 35's will be owned
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at a reduced cost. In Chapter 13, when reverse spreads were discussed, the strategy
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in which one sells a call with a lower strike and then buys more calls at a higher strike
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was termed a reverse ratio spread, or backspread. The strategy just described is
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merely the diagonalizing of a backspread. This is a strategy that is favored by some
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professionals, because the short call reduces the risk of owning the longer-term calls
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if the underlying stock declines. Moreover, if the underlying stock advances, the pre
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ponderance of long calls with a longer maturity will certainly outdistance the losses
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on the written call. The worst situation that could result would be for the underlying
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stock to rise very slightly by near-term expiration. If this happened, it might be pos
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sible to lose money on both sides of the spread. This would have to be considered a
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rather low-probability event, though, and would still represent a limited loss, so it
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does not substantially offset the positive aspects of the strategy.
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