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Article Archive For Roger Ison, Ph.D.

  • Persistent Option Volatility by Roger Ison, Ph.D.

    ARTICLE SYNOPSIS ...Stocks & Commodities V. 23:8 (14-20): Persistent Option Volatility by Roger Ison, Ph.D. Do you really understand what your options model is doing? Let's find out. If you trade options, you know that mathematical option models are essential tools and, generally, very good. Market makers rely on option models explicitly; for example, at least one well-known broker provides tight, mechanically derived, online bid and ask prices for any option, and usually executes trades at their model prices instantly, without human intervention. Brokers' models can be quite sophisticated, taking into account ...

  • Split Synthetic Stock Positions by Roger Ison, Ph.D.

    ARTICLE SYNOPSIS ...Split Synthetic Stock Positions by Roger Ison, Ph.D. Use this flexible but little-known strategy to buy stock inexpensively, deploy cash more effectively, and diversify your portfolio. Suppose that a stock you follow, Abcd Inc. [ABCD], has just taken a substantial price hit. It's really beaten down. Its sector has had some news that made investors nervous, and now there are some negative analyst comments about the company itself. But you know this company. You watch it, you understand its business, and in your judgment, these shares are now an excellent deal. On its merits, ABCD is a stock y...

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