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- From: dbk@pslu1.psl.wisc.edu (Don Katz)
- Subject: Re: Covered Calls: Less Risk - High Returns.
- Message-ID: <1993Jan21.152239.7011@pslu1.psl.wisc.edu>
- Organization: Physical Sciences Lab, University of Wisconsin
- References: <1993Jan18.230334.26026@novell.com> <1993Jan20.192644.13834@mobil.com>
- Distribution: usa
- Date: Thu, 21 Jan 93 15:22:39 GMT
- Lines: 43
-
- In article <1993Jan20.192644.13834@mobil.com> etpeters@dal.mobil.com (E. T. Peterson(Eric)) writes:
- >In article <1993Jan18.230334.26026@novell.com>, anand@novell.com writes:
- >|> I friend told me about the covered calls. This looks like very low
- >|> risk but good return to me.
- >In summary, doing covered calls may increase your income on individual stocks,
- >but does not improve the performance of diversified portfolios. It gives you
- >a little protection in bear markets, but greatly underperforms in strong
- >bull markets.
-
- I did some spreadsheet modelling of covered calls (out-of-the money
- calls, to be precise) a couple of years ago. I concluded that if the
- probability distribution of returns for holding stocks was balanced
- (equal probability of gains and losses, and expected return of 0), the
- premium received for selling the call exactly balanced the gains given
- up, so that the expected return of a covered call strategy was also 0.
-
- If the probability distibution was skewed to the right (rising market,
- or effective stock picking, or both) so that the expected return was >
- 0 for holding stocks, a covered call strategy had a lower expected
- return than just holding stocks, since there was a higher probability
- of stock price increases above the strike price.
-
- In a declining market, covered calls did a little better than stocks.
-
- Given that stock price returns, over the long haul, are biased
- upwards, I would argue that selling calls is a poor strategy. In
- addition, I would argue that if you don't believe you can pick stocks
- that will do better than the market, I think an investor is better off
- in mutual funds. And if you *do* believe you can pick winning stocks,
- why give up the upside by selling calls?
-
- In defense of covered calls, they do reduce the variability of
- returns. But so does holding part of your portfolio in cash, and it's
- a lot less work.
-
- Don
-
-
- --
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- Don Katz . Physical
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