The overall value of an option is actually determined by six factors: strike price, current market price of underlying stock, dividend yield, prime interest rate, proximity to expiration date, and the volatility of the stock prices over the course of the option.
If stamp prices go up in the future, new stamps will be issued to cover the rate for items that the post office calls nonmachinable -- meaning the odd size or shape of the envelope means it cannot be sorted on the agency's automated equipment. They will continue to use butterflies as art on the stamps. If, on the other hand, your letter is just heavy, the butterfly stamp is overdoing it. The two-ounce rate is 61 cents. The 64-cent butterfly stamp would work, but it would be overpaying by 3 cents.
The U.S. Postal Service is lowering the price of postage stamps for the first time in 97 years, the agency announced Thursday. The price of a stamp to mail a standard letter will drop from 49 cents to 47 cents on Sunday, Fortune reported. The price of a postcard stamp will fall to 34 cents, down 1 cent. International mail will fall to $1.15 from $1.20. The change will hurt people who had collected Forever stamps, which take on the value of the current postage rate no matter how much they cost when they were purchased.