Stocks and Asset Classes Explained Simply - Behavioral Finance Chapter 12 Part 1

Up to this point in Behavioral Finance and Investor Types, Michael Pompian has been talking about psychology, biases, and investor personalities. Chapter 12 switches gears. Now he lays out what you can actually invest in. Because knowing your own biases is great, but at some point you need to understand the tools on the table.

The chapter opens with a Thoreau quote about building castles in the air and then putting foundations under them. Fitting. This chapter is the foundation.

The Three Types of Assets

Before getting into stocks and bonds, Pompian groups all assets into three categories. This is a clean way to think about it.

Capital assets are things that generate future cash flows. Stocks, bonds, hedge funds, private equity. Their value comes from the money they will produce in the future. This is the main category the chapter focuses on.

Economic input assets are commodities. Copper, grain, oil. Stuff that gets consumed or transformed into products. You don’t hold copper because it pays dividends. You hold it because someone needs it to make wiring.

Value storage assets don’t generate cash and aren’t used in production. Art. Gold (mostly). Their value only shows up when you sell them. Gold is a funny one because it sits in two categories. It stores value, but it’s also used in jewelry and electronics.

The Football Analogy

Pompian uses an American football team to explain how asset classes work together. Large-cap stocks are the offensive linemen. Unglamorous but they keep things moving. Small-cap stocks and private equity are the flashy receivers. Big plays, but they can fumble at the worst moment.

On defense, cash is the immovable lineman (though inflation eats at it). Bonds are linebackers protecting from wild swings. Hedge funds are defensive backs. Nimble, sometimes spectacular, sometimes burned. The portfolio manager is the head coach picking the right mix.

Historical Returns: The Numbers

The book includes a table of historical returns and risk (standard deviation) over a 20-year period ending in 2011. Here’s what stands out.

Private equity had the highest compound return at 14.6% but with 14.0% standard deviation. High reward, high volatility. U.S. mid-cap stocks returned 10.3% with 16.7% risk. Emerging market stocks returned 8.8% but with 23.9% standard deviation, which is a lot of bumps along the way.

On the safer side, U.S. aggregate bonds returned 6.7% with only 3.8% standard deviation. Cash returned 3.3% with almost no volatility (0.06%). Boring but stable.

Here’s the thing. Higher return almost always comes with higher risk. There is no free lunch. The whole point of building a portfolio is mixing these together so the ups and downs don’t all happen at the same time.

Stocks: Why People Buy Them

So why do investors buy stocks when bonds are safer? One phrase: equity risk premium. Historically, U.S. stocks have returned about 5% per year more than bonds. Over decades, that adds up to a massive difference in wealth.

But here’s the problem. That extra return comes with real risk. Stocks can drop 30%, 40%, even 50% in a bad year. Bonds rarely do that.

Foreign stocks from developed countries offer a similar risk premium to U.S. stocks, but with an extra twist: currency effects. Pompian gives a good example. France might deliver a 4% stock return. But if the euro strengthens 5% against the dollar, a U.S. investor actually earns 9%. Currency can help or hurt.

A properly diversified portfolio should hold both U.S. and international stocks. The idea is that they don’t move in perfect lockstep, so when one is down, the other might hold up. But Pompian warns that correlations between global markets have been increasing. More multinational companies, better communication technology, deregulated financial systems. The world’s markets are more connected than ever.

How Stocks Get Categorized

The financial industry slices stocks in three main ways:

By country development. Developed markets (U.S., Europe, Japan). Emerging markets (China, Brazil, India). Frontier markets (the least developed). Fun fact: only three countries graduated from emerging to developed in 15 years. Portugal, Greece, and Israel.

By company size. Large-cap, mid-cap, small-cap. Bigger companies are generally more stable. Smaller ones can grow faster but are riskier.

By valuation style. Growth vs. value. Growth stocks have high earnings potential. Value stocks look cheap relative to their fundamentals.

Put these together and you get a style box matrix that fund managers use to categorize everything.

Private Equity: The Locked-Up Money

Private equity means investing in companies that aren’t publicly traded. Venture capital, buyouts, distressed investments. The structure is a limited partnership. The general partner (GP) manages everything. The limited partners (LPs) put up the money but have no say in daily decisions. Typical fund life is 10 years. You can’t get your money back whenever you want.

Capital gets “called” over three to five years, and the call is legally binding. If you get a notice saying “send us $2 million in five days,” you better have it ready. Fees are steep: typically 2% management fee plus 20% of profits (called carried interest).

Pompian says don’t bother with private equity unless you expect to earn about 5% above the S&P 500. Otherwise, just buy public stocks and keep your liquidity. He also recommends vintage year diversification. Spread commitments across years, like a wine collector. Some years will be bad. You don’t want all your eggs in a 2007-vintage basket.

The Takeaway

Chapter 12 Part 1 is a practical map of the investment universe. Stocks are the growth engine. They’ve historically beaten bonds by a wide margin. But they come with volatility. The way you manage that is by mixing asset classes that don’t all move together at the same time.

Private equity can supercharge returns but locks your money up for years. International stocks add diversification, though less than they used to. And no matter what you invest in, the relationship between risk and return is always there.

Understanding these building blocks is essential before the book ties everything back to behavioral investor types and how different personalities should allocate their money.

Previous: Chapter 11 - The Accumulator

Next: Chapter 12 Part 2 - Bonds, Hedge Funds, and Real Assets