Warren Buffett once joked that he spent 6% of his net worth buying his wife Susie an engagement ring, thus depriving himself of immeasurable millions in future gains.
Indeed, Buffett once was seen picking up a penny on an elevator on his way to the office and remarked to the stunned witnesses, "the beginning of the next billion."
To Warren, a $100 bill lying on a sidewalk should not be valued on its present-day worth or on the present-day efforts needed to accumulate it, but on the future value of the greenback. Suppose, for example, that Buffett could compound $100 at 25% annual rates. In 10 years, his $100 discovery would be worth $931. After 30 years, it would be worth $80,779, unadjusted for inflation.
To understand Buffett's frugal convictions, one must view them from the point of view of mathematics and by using the types of calculation just shown. To Buffett, every dollar not accumulated now or spent needlessly could have productively been turned into numerous dollars later.
Thus, everything you buy or do not buy has the potential to greatly increase or decrease your net worth, depending on the rate of return you can obtain on investments. This principle applies whether you spend money on a poorly chosen investment or on an unnecessary personal expense or luxury item.
Buffett has to make such choices because of his high opportunity costs. In contrast, a household that has no opportunity costs, that is, it doesn't invest or derives no returns from investments, may be just as well off making the various types of purchases.
A household with zero oppoortunity costs can be a net consumer with no detrimental impact to its long-term fortune, but, to Buffett, money saved is money compounded. He has been known buy 50 12-packs of Coca-Cola at once from the grocery store to get a volume discount. Each year, the money he saves buying cases of pop will ultimately increase his net worth by thousands of dollars.
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