Magic formula investing refers to a rules-based investing strategy that allows ordinary people to identify undervalued or outperforming companies. It was first described by Joel Greenblatt in The Little Book That Beat the Market in 2005.
According to IBD founder William O'Neil's rule in "How to Make Money in Stocks," you should sell a stock when you are down 7% or 8% from your purchase price, no exceptions. Having a rule in place ahead of time can help prevent an emotional decision to hang on too long. It should be: Sell now, ask questions later.
You should be looking to exit a stock trade when a price trend breaks down. This is supported by technical analysis and emphasises that investors should exit regardless of the value of the trade. It is recommended that you go back to the initial reasons for entering the trade.
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.
As long as you have sufficient time and money—whether from wages, retirement income, or cash reserves—it's important to stay the course so you can potentially benefit from the eventual recovery. That said, it generally makes sense to sell some investments and buy others as part of your regular portfolio maintenance.
The 3 5 7 rule works on a simple principle: never risk more than 3% of your trading capital on any single trade; limit your overall exposure to 5% of your capital on all open trades combined; and ensure your winning trades are at least 7% more profitable than your losing trades.
What is the 7% stop-loss rule? If the stock falls 7% or above, from the entry price, it triggers the 7% sell rule. It is time to leave and exit the position before it becomes any worse. This way, investors can stay in the game for future opportunities by saving capital.
For example, you may sell a position when it profits 20% to 25%. Once you reach this number, sell some or all of the position, or reevaluate your goals. On the other end, a stop loss helps minimize losses in a sharp downturn.
Determine company's earnings yield = EBIT / enterprise value. Determine company's return on capital = EBIT / (net fixed assets + working capital). Rank all companies above chosen market capitalization by highest earnings yield and highest return on capital (ranked as percentages).
What is the Rule of 72? Here's how it works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For example, if your investment earns 4 percent a year, it would take about 72 / 4 = 18 years to double.
Analyzing the 4-3-2-1 Rule in Real Estate
This rule outlines the ideal financial outcomes for a rental property. It suggests that for every rental property, investors should aim for a minimum of 4 properties to achieve financial stability, 3 of those properties should be debt-free, generating consistent income.
Under the wash sale rule, your loss is disallowed for tax purposes if you sell stock or other securities at a loss and then buy substantially identical stock or securities within 30 days before or 30 days after the sale.
According to William O'Neil, a noted investor and stockbroker, you may consider selling the stock when its price has gone up by 20%-25% from the ideal buy point.
The 8 Week Hold Rule is part of William O'Neil's CANSLIM strategy. He introduced this in his book How to Make Money in Stocks. It helps investors maximize gains from strong stocks. The rule advises holding a stock for eight weeks if it gains over 20% within three weeks of buying.
So just to quickly summarise:
If you're looking for the best time to either buy or sell a stock during the trading day it is; During the last 10-15 minutes before market close. Or about an hour after the market opens.
One popular method is the 2% Rule, which means you never put more than 2% of your account equity at risk (Table 1). For example, if you are trading a $50,000 account, and you choose a risk management stop loss of 2%, you could risk up to $1,000 on any given trade.
Capital losses that exceed capital gains in a year may be used to offset capital gains or as a deduction against ordinary income up to $3,000 in any one tax year. Net capital losses in excess of $3,000 can be carried forward indefinitely until the amount is exhausted.
The "11 am rule" refers to a guideline often followed by day traders, suggesting that they should avoid making significant trades during the first hour of trading, particularly until after 11 am Eastern Time.
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.
The 70:20:10 rule helps safeguard SIPs by allocating 70% to low-risk, 20% to medium-risk, and 10% to high-risk investments, ensuring stability, balanced growth, and high returns while managing market fluctuations.
It depends. If a stock price plunges because of a significant and long-term change in the company's outlook, that's a good reason to sell. Virtually all stocks, even the bluest of the blue chips, experience temporary setbacks and then move back upwards. Averaging down in such cases is a strategy to consider.
Treasurys, says Collins, are similar to government and corporate bonds, as they are backed by the full faith and credit of the U.S. government. They are typically seen as safe investments during a recession. "In times of market volatility, investors may flock toward Treasury bonds, seeking stability," he says.