Add training workflow, datasets, and runbook
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152 Part II: Call Option Strategies
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Example: The writer is buying 100 XYZ at 49 and selling 2 October 50 calls at 6
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points apiece. It was seen, by inspection, that the break-even points in the position
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are 37 on the downside and 63 on the upside. A mathematical formula allows one to
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quickly compute the break-even points for a 2:1 ratio write.
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Points of maximum profit = Strike price - Stock price + 2 x Call price
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Downside break-even point = Strike price - Points of maximum profit
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= Stock price - 2 x Call price
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Upside break-even point = Strike price + Points of maximum profit
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In this example, the points of maximum profit are 50 - 49 + 2 x 6, or 13. Thus,
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the downside break-even point would be 37 (50 - 13) and the upside break-even
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point would be 63 (50 + 13). These numbers agree with the figures determined ear
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lier by analyzing the position.
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This profit range is quite clearly wide enough to allow for defensive action
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should the underlying stock rise to the next highest strikes of 55 or 60, or fall to the
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next two lower strikes, at 45 and 40. In practice, a ratio write is not automatically a
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good position merely because the profit range extends far enough. Theoretically,
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one would want the profit range to be wide in relation to the volatility of the under
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lying stock. If the range is wide in relation to the volatility and the break-even
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points encompass the next higher and lower striking prices, a desirable position is
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available. Volatile stocks are the best candidates for ratio writing, since their pre
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miums will more easily satisfy both these conditions. A nonvolatile stock may, at
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times, have relatively large premiums in its calls, but the resulting profit range may
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still not be wide enough numerically to ensure that follow-up action could be taken.
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Specific measures for determining volatility may be obtained from many data serv
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ices and brokerage firms. Moreover, methods of computing volatility are present
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ed later in the chapter on mathematical applications, and probabilities are further
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addressed in the chapters on volatility trading.
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Technical support and resistance levels are also important in establishing the
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position. If both support and resistance lie within the profit range, there is a better
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chance that the stock will remain within the range. A position should not necessarily
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be rejected if there is not support and resistance within the profit range, but the
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writer is then subjecting himself to a possible undeterred move by the stock in one
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direction or the other.
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The ratio writer is generally a neutral strategist. He tries to take in the most
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time premium that he can to earn the premium erosion while the stock remains rel
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atively unchanged. If one is more bullish on a particular stock, he can set up a 2:1
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ratio write with out-of~the-money calls. This allows more room to the upside than to
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the downside, and therefore makes the position slightly more bullish. Conversely, if
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