Use the following option quotes for the remaining questions on the test:

Stock Price	Strike Price	Maturity	Call Price	Put Price
165.125	160	Jul	6.000	0.750
165.125	160	Aug	8.125	2.750
165.125	160	Oct	11.125	4.500
165.125	165	Jul	2.688	2.375
165.125	165	Aug	5.250	4.750
165.125	165	Oct	8.125	6.750
165.125	170	Jul	0.812	5.750
165.125	170	Aug	3.250	7.500
165.125	170	Oct	6.000	???

The quotation date is July 6. The stock pays no dividends, and all the options are European. The option expirations are July 17, August 21, and October 16, with corresponding (annual) continuously-compounded risk-free rates of .0503, .0535, and .0571, respectively. The associated number of days to expiration are 11, 46 and 102.

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The market price for the October 170 put is left out of the table. In the absence of arbitrage, and assuming zero transaction costs, what must be the market price of this put option?