The new first-class “forever” stamps, which can be purchased at today’s prices but retain their value even if the price of first-class postage increases, may not be a good investment. The price of first-class postage has always trailed inflation, and, in fact, the same law that enabled the “forever” stamp ensures that inflation will always out pace the cost of a first-class stamp. Therefore, while the $0.41 stamp now might be worth the same as, say, a $0.55 stamp in 2027, today’s $0.41 will buy more than 2027’s $0.55.