How does every term of a home insurance policy map onto a put, and why does the premium rise when markets are afraid?
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The insurance dictionary for a put
Tabulate asset insured, current value, term, maximum coverage, deductible and premium for the General Electric example: stock at $20, put struck at $18, a $2 deductible, premium .
The protective put: stock plus put
Work out the combined position when the stock falls far below the strike and when it rises far above it, and contrast it with a futures hedge that gives up the upside.
Three ways an option differs from ordinary insurance
List early exercise, marketability and the dividend adjustment, with one sentence on each.
A European option is not a futures contract
Record that exercise on the single date stays optional and that the option costs money at initiation, citing the autumn-2008 one-month S&P 500 put struck at 900.