Institutional investors once trusted a group of prominent growth companies so much that they treated them as purchases to make once and hold indefinitely. The Nifty Fifty included businesses such as Xerox and McDonald's. Strong brands and impressive records made owning them feel prudent. Confidence in the companies gradually became indifference to their prices.
That was the expensive mistake. A business can grow for years while its shareholders struggle to recover what they overpaid. Burton Malkiel separates the two judgments. Being right about a company's future does not mean the offered investment is attractive. Its price may already assume more success than the business can deliver.
What does your money actually buy?
A share gives you a claim on a business. Its value ultimately depends on cash the business can provide its owners, whether paid now or retained to finance larger payments later. Investing rests on that income and appreciation over years. Your return depends on those benefits relative to what you paid. A lower purchase price gives you more starting income for each dollar invested, even before the business grows. The same business can be an attractive purchase at one price and a disappointing one at another.
Future money is worth less than money available now because today's money can earn a return while you wait. Higher interest rates make competing bonds more attractive and reduce the present value of an unchanged stream of future payments. Greater uncertainty also gives investors reason to demand more compensation, often by paying less. Valuation connects a price to these expected benefits; it cannot make the expectations certain.
The price to earnings ratio expresses how much buyers pay for each dollar of annual earnings. In one of Malkiel's illustrations, a share earns one dollar and costs seven dollars and fifty cents. Earnings then double to two dollars, while buyers become willing to pay fifteen times earnings. The share now costs thirty dollars. Earnings doubled, but the price quadrupled because enthusiasm increased too. The process can reverse. Disappointing earnings and a lower multiple can deepen losses together.
Growth forecasts make this especially slippery. Exceptional growth for twenty years is worth far more than growth for two. Extend an optimistic forecast slightly, and an expensive share can suddenly look cheap on paper. Yet competitors arrive, businesses mature, and past growth gives limited guidance to long-term future growth. A sound calculation still needs defensible assumptions. Buying quality without examining its price leaves that work undone.
When popularity becomes the evidence
You can also buy because you expect somebody else to pay more. This speculation can succeed even if the business improves little. Rising prices attract attention, attention brings buyers, and their purchases raise prices again. Each rise seems to confirm the original story, although copying other buyers adds little independent information.
Professionals face this temptation too. A manager who avoids fashionable shares may lose clients to competitors riding the boom. Expert ownership can reflect pressure to keep up as well as a judgment about value.
The Internet boom shows why even real progress needs closer examination. Competition can pass much of an innovation's benefit to customers through lower prices, leaving suppliers with thin profits. Investors celebrated audiences and network expansion while profitable demand received less attention. Telecommunications firms built enormous capacity, helped by easy financing. Equipment suppliers also lent customers money to buy their equipment. Those sales depended on customers eventually earning enough to repay. When demand failed to support the construction, both businesses and their financial claims suffered. Useful infrastructure and growing activity had not established adequate owner profits.
In his account of the cryptocurrency boom of twenty seventeen and reversal early the following year, Malkiel separates a useful transaction-recording network from the token sold alongside it. Unlike an ordinary share, a token does not automatically confer a claim on business profits. Limiting one token's supply also leaves room for competing tokens. Technical usefulness and scarcity still leave its purchase price to justify.
Who can afford to wait?
Borrowing makes an uncertain investment more fragile. It buys a larger position with your own capital, magnifying percentage gains and losses. Interest consumes part of any gain, and the debt remains after prices fall. A lender may then demand more collateral, meaning assets or cash backing the loan. If you cannot provide it, you may have to sell. A temporary market decline can become a permanent loss for that holder.
The same dependence spread through housing finance. In Malkiel's account, lenders who could collect fees and sell mortgages onward had less reason to scrutinize repayment. Pooling the mortgages and dividing payments into claims with different priorities redistributed the risk. It did not improve borrowers' ability to pay. Protection against default depended on another institution being able to honor its promise. When house prices fell and defaults rose, heavily indebted lenders curtailed credit, carrying losses into the wider economy. The houses remained useful throughout.
Recognizing these mechanisms does not provide a reliable crash date. Expensive investments can keep rising, and your estimate of value can be wrong. When savings took years to accumulate, the financing must allow you to survive disappointment. A long horizon helps little if a lender can force you out tomorrow.
Three things to keep
Business growth can disappoint shareholders who already paid for even greater success.
A useful technology does not automatically give its investors a profitable claim.
Borrowing can force you to realize a loss before an investment recovers.