Stock Market Rules of Thumb: Four-Year Rule & Sell-Half Rule (2024)

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Stock Market Rules of Thumb: Four-Year Rule & Sell-Half Rule (1)

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Stock Market Rules of Thumb: Four-Year Rule & Sell-Half Rule (2)

The best stock market rules of thumb can help you make better investing decisions. Here’s a look at two of the best: The four-year rule and the sell-half rule

Stock market rules of thumb won’t guarantee investment success. But the best of them can be very useful in helping to boost your portfolio returns.

Here are two we like:

The Four Year Rule gets its name from the length of a U.S. president’s term of office. The rule says that an attractive buying opportunity appears in the stock market about every four years, starting just after the fall mid-term U.S. congressional elections (most recently held in November 2018).

Stock Market Rules of Thumb: Four-Year Rule & Sell-Half Rule (3)

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The sell-half rule recommends that you sell half of a stock that doubles in price and you should be quicker to sell aggressive stocks than conservative stocks. It pays to apply our sell-half rule with stocks we rate as “Speculative” or “Start-up.”

Stock market rules of thumb: The Four-Year Rule

The four-year rule may sound familiar since we’ve written about it many times in the past few decades. In fact, it’s one of the most helpful market rules we’ve ever come across.

Here’s the short version: a particularly attractive buying opportunity appears in North American stocks about every four years, usually within a few months of the U.S. mid-term election (which most recently occurred in November 2018). Investors who buy around this time tend to make substantial profits over the next couple of years.

Most “market rules” turn out to be demonstrations of the fact that random events tend to occur in bunches. The four-year rule is an exception. That’s because it’s based on developments that tend to re-occur in predictable phases of the four-year U.S. Presidential term.

Here are some statistics worth considering. From the election of Andrew Jackson in 1832 till the re-election of Barack Obama in 2012, the U.S. went through 46 complete four-year Presidential terms. (The election of Donald Trump in 2016 marked the start of the 47th term in this series.)

In the first year (that is, the post-Presidential election year) of these 46 four-year presidential terms, the average result for the U.S. stock market was a gain of 2.5%. The average for the second year (the year of the mid-term election) was a gain of 4.2%; the average for the third year (the pre-Presidential election year) was a 10.2% gain; the average for the fourth year (the Presidential election year) was a gain of 6.0%.

You might say that a large majority of North American market gains have occurred in the second half of the four-year U.S. presidential term. The pre-Presidential election year had the biggest average gain. In addition, the U.S. market has gone up in almost all of the last 19 or so pre-election years.

In contrast, the market has gone up in just over half of the past 19 or so post-election years, 12 of the 19 or so mid-term years, and about five of the last Presidential election years.

This pattern probably comes about because of a couple of unchanging things about virtually all U.S. Presidential elections:

First, virtually all U.S. political office holders, regardless of party, want to get re-elected, or pave the way to the election of a successor from their own party.

Second, U.S. Presidential elections bring out many “swing voters” who might not vote in less important elections.

When things are going well for swing voters, they tend to favour the current officeholder, regardless of party. This means current U.S. political officeholders have an incentive to make swing voters happy during U.S. Presidential elections, even if it means cooperating with the opposing party. They start work towards that goal around midway through the four-year U.S. Presidential term, around the time of the mid-term election.

That’s why newly elected or re-elected presidents introduce unpleasant necessities—such as the need to confront China—in the first year or at least first half of the term. Swing voters (or voters generally, for that matter) will have had time to get over the shock of the news before the next Presidential election. In fact, the unpleasant necessities of the first half of the term may be paying dividends by that time.

Stock market rules of thumb: The sell-half rule can be helpful to aggressive investors

Selling half of hot stocks that surge helps you guard your profits. But in general, apply this rule only to more aggressive stocks, and not to the well-established stocks that may surprise you by going a lot higher in the long run.

Selling half after a stock’s price doubles makes sense in a high-risk investment such as a penny mine. That way, you get back your initial stake. This can give you a clearer perspective on what to do with the other half of your investment. If you are too slow to sell speculative stuff, after all, your profits and even your principal can evaporate all too quick.

However, as mentioned, it’s a mistake to apply this rule to your best holdings that are not high-risk investments. To succeed as an investor, you need to hold on to your best picks for lengthy periods. If you’re too quick to sell, you’ll never hold a stock that vastly outperforms the market, and you need a few of those to offset the inevitable disappointments.

What stock market rules of thumb do you follow while making stock picks?

Have you used a stock market rule of thumb that led to a big loss? What happened?

This article was originally published in June 2017 and is regularly updated.

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Stock Market Rules of Thumb: Four-Year Rule & Sell-Half Rule (2024)

FAQs

What is the 50% rule in stocks? ›

The fifty percent principle is a rule of thumb that anticipates the size of a technical correction. The fifty percent principle states that when a stock or other asset begins to fall after a period of rapid gains, it will lose at least 50% of its most recent gains before the price begins advancing again.

What is the 3-5-7 rule in trading? ›

What is the 3 5 7 rule in trading? A risk management principle known as the “3-5-7” rule in trading advises diversifying one's financial holdings to reduce risk. The 3% rule states that you should never risk more than 3% of your whole trading capital on a single deal.

What is a good rule of thumb for selling stocks? ›

This simple calculation shows how effective following the 20%-25% profit-taking rule can be as part of a strategy for when to sell stocks. Here's how it works: Take the percentage gain you have in a stock. Divide 72 by that number.

Should a 70 year old be in the stock market? ›

Conventional wisdom holds that when you hit your 70s, you should adjust your investment portfolio so it leans heavily toward low-risk bonds and cash accounts and away from higher-risk stocks and mutual funds. That strategy still has merit, according to many financial advisors.

What is the golden rule of stock? ›

2.1 First Golden Rule: 'Buy what's worth owning forever'

This rule tells you that when you are selecting which stock to buy, you should think as if you will co-own the company forever.

What is the 80% rule in trading? ›

The 80% Rule is a Market Profile concept and strategy. If the market opens (or moves outside of the value area ) and then moves back into the value area for two consecutive 30-min-bars, then the 80% rule states that there is a high probability of completely filling the value area.

What is 90% rule in trading? ›

The 90 rule in Forex is a commonly cited statistic that states that 90% of Forex traders lose 90% of their money in the first 90 days. This is a sobering statistic, but it is important to understand why it is true and how to avoid falling into the same trap.

What is the 11am rule in the stock market? ›

This Rule of Thumb is possibly the most important one.

The Rule goes something like this. If the market has not reversed by 11am (Chicago time, CST) then it's unlikely to be a Reversal day. Don't expect any strong moves against the morning trend direction.

What is the 10 am rule in stocks? ›

Some traders follow something called the "10 a.m. rule." The stock market opens for trading at 9:30 a.m., and the time between 9:30 a.m. and 10 a.m. often has significant trading volume. Traders that follow the 10 a.m. rule think a stock's price trajectory is relatively set for the day by the end of that half-hour.

What is No 1 rule of trading? ›

Rule 1: Always Use a Trading Plan

You need a trading plan because it can assist you with making coherent trading decisions and define the boundaries of your optimal trade.

What is the best day to sell stocks? ›

If Monday may be the best day of the week to buy stocks, then Thursday or early Friday may be the best day to sell stock—before prices dip.

Should I sell half my stock when it doubles? ›

Locking-in profits

In my opinion, one of the simplest, oldest methods, and most effective ways to help lock in profits and let your winners ride, especially with lower-priced, smaller-cap stocks, is to sell half on a double. This way you take your initial investment off the table and you let your winnings ride.

At what age should you take your money out of the stock market? ›

There are no set ages to get into or to get out of the stock market. While older clients may want to reduce their investing risk as they age, this doesn't necessarily mean they should be totally out of the stock market.

How much money do I need to invest to make $3,000 a month? ›

Imagine you wish to amass $3000 monthly from your investments, amounting to $36,000 annually. If you park your funds in a savings account offering a 2% annual interest rate, you'd need to inject roughly $1.8 million into the account.

How much should a 65 year old have in stocks? ›

Generally Recommended Allocation for 65-Year-Olds

Traditionally, financial models recommended that investors subtract their age from 100 to determine the percentage of their portfolio that should be in stocks. For example, if you were 65, you should have 35% in stocks under this model, as 100 minus 65 equals 35.

How do you calculate a 50% rule? ›

Calculating the 50% rule
  1. Determine the gross monthly income collected from the property.
  2. Multiply the gross income by 0.50.
  3. The result estimates the property's monthly operating expenses and cash flow.
Nov 30, 2023

How do I use the 80 20 rule to invest in stocks? ›

Stocks are inherently risky assets due to the unpredictability of future performance. One method for using the 80-20 rule in portfolio construction is to place 80% of the portfolio assets in a less volatile investment, such as Treasury bonds or index funds while placing the other 20% in growth stocks.

What is the 60 40 rule in stocks? ›

The “60/40 portfolio” has long been revered as a trusty guidepost for a moderate risk investor—a 60% allocation to equities with the intention of providing capital appreciation and a 40% allocation to fixed income to potentially offer income and risk mitigation.

What is the 90% rule in stocks? ›

Understanding the Rule of 90

According to this rule, 90% of novice traders will experience significant losses within their first 90 days of trading, ultimately wiping out 90% of their initial capital.

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