I have a question regarding tax losses of stock options. If I purchase a put and do not exercise it, is the cost I paid for the put considered a tax loss?

[bryan02355]

example: I own 100 shares of XYZ and I want to protect my position, so I purchase a put. The stock goes up, so I do not need to exercise the put option. The put expires worthless. I do not sell the stock. Is the cost I paid for the put considered an investment loss?  

[Anonymous_]

See https://www.taxnotes.com/research/federal/irs-guidance/revenue-rulings/rev-rul-78-182/d6cn