Bob Farrell spent decades as the head of research at Merrill Lynch, establishing himself as one of the leading market analysts on Wall Street. His insights on technical analysis and general market tendencies were canonized as “10 Market Rules to Remember” and have been distributed widely ever since. Here, we review these timeless axioms and how they can help you achieve better returns.

Key Takeaways

• Investors should keep in mind that prices never stay the same and corrections are inevitable.
• Excesses are never permanent and try using stops to take the emotion out of trading.
• Don't go with the herd, but remember that fear and greed need to take a backseat to discipline.
• Consider alternative indexes to watch the health of the market.
• Take expert advice and forecasts with a grain of salt.

1. Markets Return to the Mean Over Time

Whether they face extreme optimism or pessimism, markets eventually revert to saner, long-term valuation levels. According to this theory, returns and prices will go back to whence they came—reversion generally puts the market back to a previous state. So when it comes to individual investors, the lesson is clear: Make a plan and stick to it. Try to weigh out the importance of everything else that’s going on around you and use your best judgment. Don’t get thrown by the daily chatter and turmoil of the marketplace. 

2. Excess Leads to an Opposite Excess

Like a swerving automobile driven by an inexperienced youth, we can expect overcorrection when markets overshoot. Remember, a correction is represented by a move of more than 10% of an asset’s peak price, so an overcorrection can mean bigger movements. During a market crash, investors are presented with really great buying opportunities. But they tend overcorrect in either direction—upward or downward—and trading can happen at unbelievable levels. Tuned-in investors will be wary of this and will possess the patience and know-how to take measured action to safeguard their capital.

3. Excesses Are Never Permanent

The tendency among even the most successful investors is to believe that when things are moving in their favor, profits are limitless. That’s just not true, and nothing lasts forever—especially in the financial world. Whether you’re riding market lows which represent buying opportunities, or soaring at highs so they can make money by selling, don’t count your chickens before they’ve all hatched. After all, you may have to make a move at some point, because as the first two rules indicate, markets revert to the mean.

Markets always revert to the mean.

4. Market Corrections Don't Go Sideways

Sharply moving markets tend to correct sharply, which can prevent investors from contemplating their next move in tranquility. The lesson here is to be decisive in trading fast-moving markets and to place stops on your trades to avoid emotional responses.

Stop orders help traders in two ways when asset prices move beyond a particular point. By determining a specific entry or exit point, they can help investors limit the amount of money they lose, or help them lock in a profit when prices swing in either direction.

5. Public Buys Most at the Top and Least at the Bottom

The typical investor reads the latest news on their mobile phone, watches market programs, and believes what they’re told. Unfortunately, by the time the financial press gets around to reporting a given price move, that move is already complete and a reversion is usually in progress. This is precisely the moment when John Q decides to buy at the top or sell at the bottom.

The need to be a contrarian is underlined by this rule. Independent thinking always outperforms the herd mentality.

Read about Investopedia’s 10 Rules of Investing by picking up a copy of our special issue print edition.

6. Fear and Greed: Stronger Than Long-Term Resolve

Basic human emotion is perhaps the greatest enemy of successful investing. But whether you’re a long-term investor or a day trader, a disciplined approach to trading is key to profits. You must have a trading plan with every trade. You must know exactly at what level you are a seller of your stock—on the upside and the down.

Knowing when to get out of a trade is far more difficult than knowing when to get in. Knowing when to take a profit or cut a loss is very easy to figure in the abstract, but when you're holding a security that's on a quick move, fear and greed act quickly to separate you from reality and your money.

7. Markets: Strong When Broad, Weak When Narrow

While there’s much to be gained from a focus on popular index averages, the strength of a market move is determined by the underlying strength of the market as a whole. So broader averages offer a better take on the strength of the market. That’s why it can pay off to follow different indexes—at least those that are beyond the usual suspects like the S&P 500.

Consider watching the Wilshire 5000 index or some of the Russell indexes to get a better appreciation of the health of any market move. The Wilshire 5000 index is composed of nearly 4,000 U.S-based companies that are traded on an American exchange and whose pricing is available to the public. Russell indexes like the Russell 1000 and Russell 3000 are weighted by market cap and also give investors exposure to the U.S. stock market.

8. Bear Markets Have Three Stages

Market technicians find common patterns in both bull and bear market action. The typical bear pattern, as described here, first involves a sharp sell-off. During a bear market, prices tend to drop 20% or more. In most cases, bear markets involve whole indexes. This kind of market is generally caused by weak or slowing economic activity.

This is followed by what’s called a sucker’s rally. Investors can be drawn into the market by prices that jump quickly before making a sharp correction to the downside again. These rallies, which can be a result of speculation and hype, don’t last very long. But who are the suckers? The investors, of course. They’re called suckers because they may buy on the temporary highs, but end up losing money when asset prices drop.

The final stage of the bear market is the torturous grind down to levels where valuations are more reasonable and a general state of depression prevails regarding investments overall.

9. Be Mindful of Experts and Forecasts

This is not magic. When everyone who wants to buy has bought, there are no more buyers. At this point, the market must turn lower. Similarly, when everyone who wants to sell has sold, no more sellers remain. So when market experts and the forecasts are telling you to sell, sell, sell—or buy, buy, buy—be sure to know that everyone is jumping on that bandwagon, so much so that there’s nothing left to sell or buy. By the point you jump in, something else is likely to happen.

10. Bull Markets Are More Fun Than Bear Markets

This is true for most investors since prices continue to rise during these periods. Who doesn’t love seeing their profits rise? Well, unless you’re a short seller. A short sale is when you sell an asset that you don’t own yourself. Traders who use this strategy sell borrowed securities hoping the price will drop. The seller must then return an equal amount of shares in the future.

The Bottom Line

No one said investing was easy. There's a lot at stake, and so much to take in. Whether you're a novice trader or someone who's been watching the markets for a great deal of time, it's easy to get caught up in the swings of market news, emotions, and the free-for-all of the market. But if you follow Bob Ferrell's time-tested secrets, you may just come out a winner in the end.

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1. Wilshire. "Indexes."

2. FTSE Russell. "Russell U.S. Equity Indexes," Page 6.

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