John Bogle offers wisdom to those always in search of “complex” solutions:
The Greek philosopher Archilochus tells us, the fox knows many things, but the hedgehog knows one great thing. The fox — artful, sly and astute — represents the financial institution that knows many things about complex markets and sophisticated marketing. The hedgehog — whose sharp spines give it almost impregnable armor when it curls into a ball — is the financial institution that knows only one great thing: long-term investment success is based on simplicity.
Deal with Trading Losses
You are going to have losses when you trade. If you don’t have losses, you are not taking risk. If you don’t risk, you won’t win. Losses aren’t the problem. They are part of the game. It’s how you deal with losses that is crucial. Ignore losses and they will come back to bite you. Trend Followers handle loss by limiting all positions to a set percent of equity. You always know that if your equity is going down due to losses, you decrease trading size (or exit). On the other hand when you are going up, you automatically compound profits and add more. This is the sensible way to trade and not stick your neck out. You can always come back and play the game again tomorrow.
The mechanism described here, decreasing size as equity falls and increasing as it rises, is the mathematical definition of volatility-adjusted position sizing applied to account equity. It is not just a risk management technique. It is the compounding engine of systematic trend following. When a system is performing well and equity is growing, the same percentage applied to a larger base produces larger positions, which produce larger absolute gains, which further grow the base. The growth compounds. When a system enters a drawdown and equity falls, the same percentage applied to a smaller base produces smaller positions, which limits the depth of the drawdown and preserves enough capital to participate fully when the favorable conditions return. The asymmetry is by design: losses shrink the bet, wins grow it.
The Impact of Lifestyle
Maintaining a balanced lifestyle is critical for profitable trading. Some of the best traders are very frugal. They don’t trade in order to live large with the next new sports car, etc. They understand trading is about process. Unlike the majority, they don’t expect the market to do what they want exactly at the time they want it. They don’t make demands on the market to perform at preset times because they know that if you don’t have a passion for the process of successful trading, not the material goal, you wind up losing more. They know that you can’t get more out of a market than is there. If you’re going to be flat because the market is going sideways, there’s nothing to do. So that’s what you do. Nothing. But if you have a lavish lifestyle to support, it may be difficult to do nothing. Lifestyle cannot be your goal. Profits are the goal. If you trade correctly you will make the profits when the targets of opportunity are present. Your lifestyle will unfold as part of that process, but it doesn’t drive the process.
The lifestyle observation is one of the most practical in this page. A trader who needs the account to produce income on a regular schedule is a trader who cannot wait. They must take trades when the schedule demands it, not when the signals appear. They must take profits before the trend has run its full course because they need the cash. They exit positions that are going against them not when the rules say to exit but when the account balance is causing stress. All of these behaviors degrade performance relative to a trader whose financial needs are met independently of trading income and who can therefore follow the rules without external pressure distorting their execution.
Risk Taking
When most people first start trading they often start small. As they get better at it, they trade more. They might start with one contract and then move to ten contracts. As time progresses, some may reach a certain comfort level and become afraid to take risks beyond that level. The object is to try to keep trading in constant leverage terms. In other words, you trade the same as your equity increases. By using a Trend Following approach to money management, you are never afraid of getting big. You are prepared. You know what you will do in advance as your account grows. This is key to Trend Following money management.
The comfort level plateau is one of the most common and least discussed failure modes in successful trading. A trader who grows an account from $50,000 to $500,000 has done something genuinely difficult. At that point, scaling from five contracts to fifty contracts requires a psychological adjustment that the rules mandate but the trader’s risk aversion resists. The $500,000 account position has the same percentage risk as the $50,000 account position. But the absolute dollar amount is ten times larger, and the emotional experience of a loss at that scale is qualitatively different from the early experience. The trader who caps their size at their comfort level is leaving compounding on the table. The mechanical approach to position sizing, applying the same percentage consistently regardless of account size, removes the comfort level as a variable entirely.
Mechanical Trading Systems
When you take a risk it is useful to have a mechanical trading system for several reasons: You increase your diversification, force discipline, reduce your work load and make your trading life easier through automation. Mechanical trading systems enable you to take a risk without getting personally involved. Although you might not be happy when you are going through a drawdown or taking a loss, at least you’re not agonizing over your trading decisions on a day-to-day basis. It’s the rare individual who can sit in front of a quote screen and make consistently good trading decisions day after day. Other components of your life will always impact your thinking generally and your trading decisions specifically, unless you rely on a mechanical trading system that locks out discretion.
The Bogle hedgehog framing applies directly to the mechanical system argument. The fox knows many things and applies them all to every decision. The hedgehog knows one great thing and applies it consistently. The mechanical trend following system knows one great thing: follow the price trend with defined entries, defined exits, and correct position sizing. It does not know what the Fed will do, what earnings will be, or what next year’s GDP will look like. It does not need to. The one great thing, applied consistently and mechanically, is sufficient. The fox’s many things add complexity without adding edge.
Frequently Asked Questions
Why are trading losses not the real problem?
Because losses are an expected and necessary feature of any positive-expectation system with a win rate below 100%. A system that wins 40% of the time will lose on 60% of trades. Those losses are not failures. They are the cost of being in the market to capture the winners. The problem is not losses. The problem is losses that are not managed: losses that are held past predefined stops, losses that are rationalized away, or losses that grow large enough to impair the capital base. Managed losses are the price of admission. Unmanaged losses are the cause of failure.
How does lifestyle affect trading performance?
By creating external pressure to generate income on a schedule that does not match the market’s schedule for providing profitable opportunities. A trader who needs monthly income must act when the account demands it rather than when the signals appear. This produces trades taken outside the system’s criteria, positions exited before their time, and losers held longer than the rules prescribe because the trader cannot absorb the cash loss. Independence from trading income is the practical prerequisite for following a system without external pressure distorting execution.
What is the comfort level plateau and why does it limit compounding?
The comfort level plateau is the point at which a trader’s risk aversion prevents them from scaling position sizes proportionally with account growth. A trader whose rules specify 2% risk per trade should apply that same 2% whether the account is $50,000 or $500,000. The absolute dollar amount scales with the account. If the trader caps their size at the comfort level established when the account was smaller, they prevent the compounding that correct percentage-based sizing would produce.
Trend Following Systems
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