Investing Through Market Cycles With Rules You Set Now

Write one sentence before reading further. It’s the share of your portfolio you want in stocks. Sixty percent, seventy, whatever fits how long the money can stay invested. Everything below hangs off that number, because it’s the one figure here you choose yourself, and it’s the one a rough market will try hardest to talk you out of, often at the moment when changing it costs the most.

Nobody knows the stage of the cycle while it’s happening. Prices move before the data. Spreads widen before a recession is dated, and sectors lead for reasons that change from one cycle to the next, so any rule that starts with “first, work out the stage of the cycle” starts with the one step nobody can do reliably. The rule below skips that step.

A target and a band

Take a hypothetical $100,000 portfolio with a 60% target in stocks. That’s $60,000 in stocks and $40,000 in bonds and cash.

A target on its own would have you trading every week. So add a band of 5 points each way. While stocks sit between 55% and 65% of the portfolio, you do nothing. Outside that range, you trade back toward 60%.

The band makes the rule livable. Small moves are noise. Trading on them costs money and attention and barely changes your risk.

When stocks fall

Now a rough year. Stocks fall 22%. Bonds, in this example, rise 8%.

The rule has triggered. Rebalance back toward 60%.

Look at what you didn’t have to decide. Whether the economy was entering a recession, whether the fall was a correction or the start of a bear market, and what the credit market was saying about next year all stayed open questions, and the rule acted anyway because the portfolio had drifted outside its band.

The objection: what if stocks keep falling?

They might. Buying $7,200 of stocks after a 22% fall doesn’t mean they’ve bottomed, and if they keep falling you’ll hold more of them than you would have without the trade. That’s the strongest case against the rule.

The answer is that you haven’t added risk. You’ve restored the level you chose when you set 60% as your target. If stocks drop far enough to push the weight below 55% again, the rule triggers again, and you buy again. If you can’t face buying stocks after a fall at all, the target is too high. Lower it in a calm month, on paper.

When the target itself should change

The band answers the market. Your life is a separate input. If the money’s due date moves closer, if your income becomes less secure, or if you find the swings harder to live with than you expected, the 60% itself may be wrong, and changing it is a legitimate decision as long as you make it for one of those reasons, write down why, and do it on a quiet day when the market isn’t the thing pushing you.

Keep the rule simple

The one above fits on a sticky note. Sixty percent stocks, band 55 to 65, check monthly, trade back to 60 when outside. Resist clauses like “unless the Fed is hiking” or “unless spreads are widening”, since each one reopens the exact decision the rule was meant to close, and in a bad week you’ll find a reason to invoke every exception you wrote. Short rules survive stress.

Traders can apply the same idea to position size. Fix the risk per trade in advance. Leave it alone after a losing streak.

For practice deciding as conditions shift, Risk-On, Risk-Off or Sit Tight? scores the reasoning behind each move. The longer argument against labeling the phase sits in the viewpoint on naming the cycle stage. To follow the data without letting them rewrite your rule, take Macro Weather for Stock Pickers, which covers the releases that matter to stock investors, or start from the economics hub.