Money & Finance › Asset types & alternatives
Asset classes: the menu of investments
· Concept
Fact, law or dataA rule, statute, definition or measured number.
Asset classes are the broad groups of investments, such as stocks, bonds, cash, real estate, commodities and alternatives, that behave differently.
See it on the Money & Finance map →How it works
Each class is a different kind of claim. Stocks are ownership with variable profits; bonds are loans with fixed payments; cash is very short lending you can recall at once; real estate earns rent; commodities are raw materials with no income; alternatives are private funds and collectibles. Since 1926, US large-company stocks returned roughly 10% a year, long-term government bonds about 5% and T-bills about 3%, against inflation near 3%. The higher returns came with deeper drops.
Why it matters
The mix of classes, more than individual picks, drives a diversified portfolio's growth and its worst drawdowns, so it is the first choice in any plan.
Think of it like
Like property types (office, industrial, multifamily, retail): each has its own cycle, yield and risk.
Facts, rules and data
Return histories such as the Ibbotson/Morningstar SBBI data since 1926 and Dimson, Marsh and Staunton's global data since 1900.
Debates and risks
Where crypto and private credit fit, and whether past returns of each class will repeat, are open questions.
Inside this (6)
Connections (5)
▸Asset classes: the menu of investments include Bonds: lending money in exchange for interestFact, law or data
The connection
Bonds are the main defensive asset class: fixed interest, return of principal at maturity, and payment ahead of stockholders in bankruptcy. In exchange they have earned less: about 5% a year for long-term US government bonds since 1926, versus about 10% for stocks.
When and why
Government borrowing dates to medieval Venice and Britain's consols (1751); bonds are a standard building block of every institutional portfolio.
How we know
Long-run return data, such as SBBI since 1926 and Dimson, Marsh and Staunton since 1900, show bonds' distinct returns and behavior.
Debates and risks
Whether junk bonds, inflation-linked TIPS and private credit belong in the same class as Treasuries is debated, since they behave very differently in crises.
▸Asset classes: the menu of investments include Stocks: owning a slice of a companyFact, law or data
The connection
Stocks are the growth asset class: owners share in profits after lenders are paid, with no cap on gains and no promise of payment. That has meant the highest long-run returns, about 10% a year for US large companies since 1926, and the deepest drops.
When and why
Shares have traded since the Dutch East India Company (1602); US stocks now make up roughly 60% of global stock-market value.
How we know
Long-run data from SBBI and Dimson, Marsh and Staunton; Jeremy Siegel's Stocks for the Long Run popularized the record.
Debates and risks
Whether US stocks' strong past reflects a lucky century: some markets, such as Russia's in 1917 and China's in 1949, were wiped out entirely.
▸Diversification and asset allocation spreads money across Asset classes: the menu of investmentsMainstream view
The connection
Asset allocation spreads money across classes whose returns don't move in step, which sets the portfolio's expected growth and its worst drop. In 2007–09, an all-stock US portfolio fell about 51% including dividends; a 60/40 stock-bond mix fell roughly 30–35%.
When and why
Markowitz (1952) set out the theory; David Swensen's Yale 'endowment model' from 1985 extended it to alternatives.
How solid is the link?
Studies such as Brinson, Hood and Beebower (1986) and Ibbotson and Kaplan (2000) find allocation explains most of a portfolio's ups and downs over time.
Debates and risks
How far to trust historical correlations, and whether alternatives truly diversify or just report smoothed prices, are debated.
▸Real estate as an investment is the largest of Asset classes: the menu of investmentsFact, law or data
The connection
By value, real estate is the largest asset class on earth. Savills estimated world property at about $380 trillion in 2022, more than all listed stocks and bonds combined. About three quarters of it is homes, which is why property shapes household wealth almost everywhere.
When and why
Savills World Research estimates, published periodically since 2016.
How we know
The estimates combine national statistics and models; commercial values rest on appraisals, so the totals are approximate.
Debates and risks
How much is truly investable: most is owner-occupied homes, and professionally managed property is a far smaller slice.
▸Alternative investments: private funds, art and collectibles add illiquid options to Asset classes: the menu of investmentsFact, law or data
The connection
Alternatives extend the menu beyond public stocks, bonds and cash with private equity, venture capital, hedge funds, private credit, infrastructure and collectibles. Investors give up the ability to sell quickly, often for a decade, in hope of an 'illiquidity premium' and returns that move differently from public markets.
When and why
Yale under David Swensen from 1985 led the shift; pensions and sovereign wealth funds followed, and the 2020s push targets individuals and 401(k)s.
How we know
Endowment and pension reports show large allocations; Cambridge Associates and Preqin publish fund return data.
Debates and risks
Whether an illiquidity premium survives fees, or smoothed appraisals simply understate the true risk, is debated.