Phil McDonnell has professionally traded options for decades. He has developed extensive proprietary software for options analysis and probability calculations. He was founder and software developer for Dollar/Soft, which sold options analysis software. Since then he has devoted himself to full-time options trading.Expand

McDonnell is a frequent contributor to Daily Speculations. He has also authored a book titled Optimal Portfolio Modeling, which was published by Wiley Trading in 2008.Collapse

Let's take a look at how to use both bullish and bearish calendar spreads.

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