US & World Economies World Economy Trade Policy What Gives Money Its Value? Who decides how much money is worth? By Kimberly Amadeo Kimberly Amadeo Kimberly Amadeo is an expert on U.S. and world economies and investing, with over 20 years of experience in economic analysis and business strategy. She is the President of the economic website World Money Watch. As a writer for The Balance, Kimberly provides insight on the state of the present-day economy, as well as past events that have had a lasting impact. learn about our editorial policies Updated on April 21, 2022 Reviewed by Erika Rasure Reviewed by Erika Rasure Erika Rasure, is the Founder of Crypto Goddess, the first learning community curated for women to learn how to invest their money—and themselves—in crypto, blockchain, and the future of finance and digital assets. She is a financial therapist and is globally-recognized as a leading personal finance and cryptocurrency subject matter expert and educator. learn about our financial review board Fact checked by Ariana Chávez Fact checked by Ariana Chávez Ariana Chávez has over a decade of professional experience in research, editing, and writing. She has spent time working in academia and digital publishing, specifically with content related to U.S. socioeconomic history and personal finance among other topics. She leverages this background as a fact checker for The Balance to ensure that facts cited in articles are accurate and appropriately sourced. learn about our editorial policies Share Tweet Pin Email In This Article View All In This Article How To Measure the Value of the Dollar Why the Dollar Changes in Value What Is the Time Value of Money? How the Value of Money Affects You When the Value of Money Declines When the Value of Money Increases How the Value of Money Has Changed The Bottom Line Frequently Asked Questions (FAQs) Photo: The Balance / Theresa Chiechi The value of money is determined by the demand for it, just like the value of goods and services. You can measure the value of money by what people will exchange for it and by how much of it there is. Learn how the value of money is determined and who decides it. Key Takeaways You can measure the value of money by how much it will buy in foreign currencies, the demand for Treasury notes, and how much is held in foreign exchange reserves.When the value of money declines over time and the prices of goods increase, it is called inflation. When prices fall steadily over time and the value of money increases, it is called deflation, and it can have a harrowing effect on the economy.It is more valuable to have money today than to have money in the future because of the money's earnings potential; this is the time value of money. How To Measure the Value of the Dollar There are three ways to measure the value of the dollar. Foreign Exchange Rate The first way to measure the value of the dollar is by how much the dollar will buy in foreign currencies. That's what the foreign exchange (forex) rate measures. Forex traders on the foreign exchange market determine exchange rates. They take into account supply and demand, and then they factor in their expectations for the future. For this reason, the value of money fluctuates throughout the trading day. Treasury Note Values The second method to measure the value of the dollar is the value of Treasury notes. They can be converted easily into dollars through the secondary market for Treasurys. When the demand for Treasurys is high, the value of the U.S. dollar rises. Foreign Exchange Reserves The third way is through foreign exchange reserves. That is the amount of dollars held by foreign governments. The more they hold, the lower the supply. That makes U.S. money more valuable. If foreign governments were to sell all their dollar and Treasury holdings, the dollar would collapse. U.S. money would be worth a lot less. Why the Dollar Changes in Value No matter how it's measured, the dollar's value declined from 2000 to 2011. That was due to a relatively low federal funds rate, a high federal debt, and a slow-growth economy. Since 2011, the U.S. dollar has risen in value despite these factors. Why? Most of the economies in the world had even slower growth. That made traders want to invest in the dollar as a safe haven. As a result, the dollar strengthened against the euro. What Is the Time Value of Money? Money also has a time value. Money today is worth more than money in the future because today's money can be invested and grown. To calculate the time value of money (TVM), you must consider the present value, the time frame available, and the rate at which it can grow. Note The formula for finding the time value of money is FV = PV x [ 1 + (i / n) ] (n x t), where FV is the future value, PV is the present value, i is the interest rate, n is compounding periods per year, and t is the number of years. Here is an example of finding the time value of money. If you had $100 in present value, a 5% interest rate, and interest that compounds annually, you would be able to calculate the future value of the money after one year. FV = $100 x [1 + (5% / 1)] (1 x 1) = $105 You would have $105 in future value. How the Value of Money Affects You The value of money affects you every day at the gas pump and the grocery store. Demand for gas and food is inelastic. Producers know you have to buy gas and food every week. It's not always possible to delay purchases when the price rises. Producers will pass on any of their extra costs. You will buy it at the higher price for a while until you can change your habits. Note When the price of gas or food goes up, you are experiencing the reduced value of money. In March 2022, the food index increased 8.8%—the highest in 40 years. When the Value of Money Steadily Declines Inflation is when the value of money steadily declines over time. Once people expect that prices will rise, they are more likely to buy now, before prices go higher. That increases demand, which tells producers they can safely pass on more costs. They drive prices up more, and inflation becomes a self-fulfilling prophecy. That's why the Federal Reserve watches inflation like a hawk. It will reduce the money supply or raise interest rates to curb inflation. Core inflation is the price of everything except food and gas prices, which are very volatile. The Consumer Price Index is the most common measure of inflation. When the Value of Money Increases Deflation occurs when the general price level across the economy declines. That sounds like a great thing, but it is worse for the economy than inflation. Why? Think about what happened to the housing market from 2007 to 2011. That was massive deflation. Many people could not sell their houses for what they owed on their mortgage. Buyers were afraid that the price would drop right after they purchased it. No one knew when prices would turn back up. True, the value of money increased. You received more house for the dollar in 2011 than in 2006. But families lost homes. Construction workers lost jobs. Builders went bankrupt. That's what makes deflation so dangerous. It's a fear-driven downward spiral. How the Value of Money Has Changed Over Time In 1913, money was worth a lot more. A dollar then could buy what $29.04 could purchase in 2022. The dollar lost value slowly. By 1920, it could buy what $14.38 could in 2022. During the Great Depression, money gained in value as a result of deflation. A dollar in 1930 could buy what $17.22 could in 2022. By 1950, money had lost some value. A dollar could buy what $11.93 could buy in 2022. Money has been losing value ever since. In 1970, it could only buy $7.41 in 2022 terms. By 1990, it was only worth $2.20, also in 2022 terms. In 2000, it was worth $1.67 in 2022 terms. The Bottom Line Because of inflation, your dollar today is worth more than it will be in the future. But the day-to-day value of money fluctuates as well because of the volume of demand for it. Dollar demand is measured by the exchange rate value, the value of Treasury notes, and the amount in foreign exchange reserves. Although rising prices will lessen the purchasing power of money, generalized decreasing prices or deflation can be bad for the economy. Yes, deflation will certainly raise the value of money or its purchasing power. But it's the fear of rapidly plunging prices that will make people hold on to their money, lessen aggregate demand for goods and services, and cause a serious slowdown in economic activity. This makes monitoring and managing inflation and deflation two of the Federal Reserve's most important functions. Frequently Asked Questions (FAQs) What might cause a change in the value of fiat money? Value changes are the result of supply and demand. This is true with fiat currency as well as any other asset that's subject to market forces. When the supply of money increases or decreases, the relative value of that money rises or falls with those forces. Demand for certain currencies can fluctuate, as well. When it comes to money, those changes in supply and demand typically stem from activity by central banks or forex traders. What is the time value of money? The time value of money refers to the idea an amount of money is worth more now than it will be in the future, in part because of the impact of inflation. It's also affected by the opportunity cost of investments you could make now. Every day that passes without the money is another lost opportunity to invest in stocks or put the money in an interest-bearing account. Was this page helpful? Thanks for your feedback! Tell us why! Other Submit Sources The Balance uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. BabyPips.com. "How Bond Yields Affect Currency Movements." MacroTrends. "U.S. Dollar Index - 43 Year Historical Chart." MacroTrends. "Euro Dollar Exchange Rate (EUR USD) - Historical Chart." U.S. Bureau of Labor Statistics. "Using Gasoline Data to Explain Inelasticity." U.S. Bureau of Labor Statistics. "Consumer Price Index Summary." Federal Reserve Bank of San Francisco. "What Is 'Core Inflation,' and Why Do Economists Use It Instead of Overall or General Inflation to Track Changes in the Overall Price Level?" Federal Reserve Bank of St. Louis. "Inflation, Consumer Prices for the United States." Federal Reserve Bank of St. Louis. "Deflation Probability." U.S. Inflation Calculator. "Inflation Calculator." Brookings. "5 Reasons To Worry About Deflation."