Stock Formula For Profits

Your profit objective needs more than a target price. A target without a time limit can leave your money tied up indefinitely. A return target without a loss rule can expose you to a large decline. A sell rule without a reason can cause you to exit whenever fear or excitement appears. The Profit Definition Compass combines these decisions before you buy.

Set the compass with four rules:

1. Choose the return target. State the gain you want from the purchase in dollars or as a percentage of your entry price. For example, a 12% target on a $50 purchase means a planned exit near $56, before trading costs and taxes.

2. Set the holding period. Decide how long the stock has to reach the target. A 12% target with a six-month limit creates a different plan from a 12% target with a three-year limit. The time limit prevents a weak position from remaining in your account simply because you have not made a decision.

3. Set the maximum loss. Define the amount you will accept if the trade moves against you. If you buy at $50 and set a 8% maximum loss, your review or exit point sits near $46. This rule protects the formula from turning one failed idea into a much larger loss.

4. Define the exit trigger. Write the exact event that ends the position. The trigger might be the target price, the maximum-loss price, the end of the holding period, or a change in the conditions that qualified the stock for purchase. Use one written rule rather than a judgment made under pressure.

5. Record the calculation before buying. Write the entry price, target price, loss level, deadline, and reason for purchase in a trading log. This record lets you compare the original plan with the final result and improve the formula over time.

Use this simple calculation for a price target:

Target price = Entry price × (1 + target return)

For a $50 entry and a 12% target:

$50 × 1.12 = $56

Use this calculation for the maximum-loss level:

Loss level = Entry price × (1 − maximum loss)

For a $50 entry and an 8% maximum loss:

$50 × 0.92 = $46

The target and loss levels should match the purpose of the formula. A short-term purchase needs a time limit that fits a short-term plan. A long-term investment may need a wider time window, but it still needs a review date. The review date does not force a sale by itself. It forces you to check whether the stock still meets the rules that justified the purchase.

Separate realized profit from unrealized profit. A price shown on your screen may sit above your entry price, but you have not locked in that gain until you sell. For example, a stock bought at $30 and trading at $33 shows a $3 unrealized gain per share. If the price falls to $28 before you sell, the earlier gain disappears and the position becomes a loss. Your formula should state whether it measures profit only after selling or whether it also tracks open positions at their current market price.

Also account for costs. If you buy 20 shares at $50, your starting position equals $1,000 before commissions, fees, and taxes. A sale at $56 produces $1,120 before those costs, or a $120 gross gain. Your actual result may differ. Record the result after applicable costs so the formula reflects the money you keep, not only the price movement.

Apply the Compass Before the Order

Use the Profit Definition Compass on one purchase before you apply it across your account. The following example uses a $2,000 position and shows how each rule controls the decision.

1. Set the entry price and position size. The planned entry price is $40, and the allocation is $2,000. That allows 50 shares before costs: $40 × 50 = $2,000. The position size matters because a percentage gain becomes a dollar result only after you apply it to the amount invested.

2. Set the profit target. The target return is 15%. The target price becomes $46: $40 × 1.15 = $46. If the stock reaches $46, the gross gain equals $6 per share, or $300 across 50 shares.

3. Set the maximum loss. The maximum loss is 7.5%. The loss level becomes $37: $40 × 0.925 = $37.50, which you can round according to your trading rules. At $37.50, the gross loss equals $2.50 per share, or $125 across 50 shares.

4. Set the deadline. The stock has six months to reach the target. If it trades at $42 after six months, the position shows a gain, but it has not met the formula’s objective. You then review the purchase using the same conditions that produced the original buy signal. You do not extend the deadline simply because you want the target to happen.

5. Write the exit rules. Sell when the price reaches $46, when the price reaches the loss level, or when the six-month deadline arrives and the stock no longer passes the purchase rules. Record the reason for the exit and the final price.

6. Measure the outcome. If the stock reaches $46 and you sell all 50 shares, the gross result is $300. If it falls to $37.50 and you sell, the gross result is a $125 loss. If it reaches $42 at the deadline and still qualifies under your rules, you may continue only if your written method allows a new holding period. Do not create that exception after the price moves.

A position can produce a positive result without meeting your planned profit objective. Selling at $42 would create a $100 gross gain, but it would not meet the 15% target. That distinction helps you judge the formula honestly. If you repeatedly sell at smaller gains because the target feels unrealistic, change the target rule during a scheduled review - not during an open trade.

Quick checklist

• Write the entry price before placing the order. - Calculate the target price from the chosen return. - Calculate the maximum-loss level. - Set a specific review or expiration date. - State whether the rule uses gross or after-cost profit. - Decide how you will handle partial sales. - Record the reason for buying and the reason for selling. - Review the result only after the position closes.

A simple table can keep the plan visible:

| Rule | Example | |---|---:| | Entry price | $40 | | Shares | 50 | | Position value | $2,000 | | Profit target | 15% | | Target price | $46 | | Maximum loss | 7.5% | | Loss level | $37.50 | | Holding period | Six months | | Planned gross gain at target | $300 | | Planned gross loss at limit | $125 |

The table does not predict the stock’s next move. It defines your response before the next move occurs. That difference makes the formula usable.

Avoid Changing the Meaning of Profit

Mistake: Treating any price increase as success

A small gain can look attractive when a position has moved against you or when the market feels uncertain. But if your formula requires a 15% return, a 3% rise does not meet the objective. Selling may still make sense, but record it as a below-target exit rather than labeling it a successful formula result.

Do this: Compare the sale price with the written target and explain any early exit.

Not this: Change the target from 15% to 3% after the stock rises 3%.

This distinction matters because your future results depend on accurate records. If you call every profitable sale a successful target hit, you will not know whether the formula actually reaches its intended objective.

Mistake: Leaving the time limit open

A stock can remain above your entry price while producing a poor use of capital. Suppose a $50 purchase reaches $51 after twelve months while your original plan allowed six months. The position produced a small gross gain, but it failed the time requirement. Keeping it indefinitely hides that failure and prevents you from comparing it with other opportunities.

Do this: Set the deadline before purchase and review the position on that date.

Not this: Extend the deadline because the company still sounds promising.

At the deadline, check the original buy conditions, current price, business information, and risk level. Continue only under a rule you wrote before the review, not because you feel attached to the stock.

Mistake: Using a loss rule that does not match the position

A maximum loss protects the plan only when you can follow it. Setting a $5 loss limit on a $20 stock creates a 25% decline, which may expose the account to more damage than intended. Setting a $1 limit on a volatile stock may trigger an exit from normal price movement. The number must fit the formula, the stock’s behavior, and the amount you can accept.

Do this: Express the loss rule as a percentage, convert it to a price, and check whether the position size makes the dollar loss acceptable.

Not this: Choose a loss level because it sits at a round number or because another investor uses it.

The Profit Definition Compass works when every purchase answers the same questions: What return do you want? How long will you wait? How much can you lose? What event ends the position? Write those answers before the order reaches the market. A clear profit definition turns a moving stock price into a set of decisions you can test, record, and improve as you build the rest of your formula.

End of chapter one. 37 more chapters and about 65,231 words in the full book.