“This is a simple method for investing systematically: Research: Ignore any stocks you do not want to own for any reason. Hold at least twenty stocks for diversification. Buy: It’s best to buy all your stocks at once. But it’s fine to scale in—make regular portfolio purchases over twelve months. One way to do it is to buy two or three stocks each month. Sell: For taxable accounts, hold winners for one year plus one day. Then sell. That maximizes after-tax returns. If a stock is up and still in the screener after one year and one day, hold until it leaves the screener. If a stock is down and in the screener, hold. If a stock is down and leaves the screener, sell. You should check your stocks at least quarterly to see if you need to buy or sell. Rebalance: Once you sell a stock, buy the next best stock in the screener you don’t already hold. The website acquirersmultiple.com has a screener for deep-value stocks listed in the United States and Canada. Sign up with the coupon “ZIG”
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Tobias Carlisle,
The Acquirer's Multiple: How the Billionaire Contrarians of Deep Value Beat the Market