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7 Timeless Investing Rules for Stocks After 10 Years in the Market

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It’s now nearly 10 years since I first started investing in stocks for my family in October 2010.

During this period, I also helped pick stocks professionally (from May 2016 to October 2019) while I was at The Motley Fool Singapore.

After all of these varied experiences, I’ve developed 7 personal investing rules for the stock market that I think are timeless.

I also think that these rules are worth sharing now.

Since there’s so much uncertainty about the future with the world living under the shadow of COVID-19.

In no particular order, here they are.

Rule 1: Focus on Business Fundamentals, Not Geopolitical and Macroeconomic Developments

Peter Lynch, the legendary manager of the Fidelity Magellan Fund from 1977 to 1990, once said:

“If you spend more than 13 minutes analysing economic and market forecasts, you’ve wasted 10 minutes.”

Focus on business fundamentals to find great companies because it is great companies that produce great long-term stock market returns.

Warren Buffett’s investment conglomerate, Berkshire Hathaway, saw its book value per share increase by 18.7% per year from 1965 to 2018.

In those 53 years, there was:

  • the Vietnam War
  • the Black Monday stock market crash in 1987
  • the “breaking” of the Bank of England
  • the Asian Financial Crisis
  • the bursting of the Dotcom Bubble
  • the Great Financial Crisis
  • Brexit, and
  • the US-China trade war

among many other important geopolitical and macroeconomic developments.

Over the same period, Berkshire’s share price increased by 20.5% per year — the 18.7% input led to a similar 20.5% output.

Rule 2: Think and Act Long-Term

I believe that the stock market has a fundamental identity: it is a place to buy and sell pieces of a business.

This also means that a stock will do well over time if its business does well.

So to excel in investing, we need to identify companies that can grow strongly over the long run.

Jeff Bezos once said:

“If everything you do needs to work on a three-year time horizon, then you’re competing against a lot of people. But if you’re willing to invest on a seven-year time horizon, you’re now competing against a fraction of those people, because very few companies are willing to do that. Just by lengthening the time horizon, you can engage in endeavors that you could never otherwise pursue.”

I believe Bezos’s quote applies to investing too.

The simple act of having a long-term mindset gives us an advantage in the market.

Investing for the long run also lowers the risk of investing in stocks.

In a column for The Motley Fool, Morgan Housel shared this chart:


Source: Fool.com

It uses data for the S&P 500 from 1871 to 2012 and shows the chance that we will earn a positive return in US stocks for various holding periods, ranging from 1 day to 30 years.

Essentially, the longer we hold our stocks, the higher the chance that we will earn a positive return.

Rule 3: Don’t Obsess Over Valuation — Instead, Focus on Business Quality

I think it’s far more important to be right about the quality of a business than it is to fret over its valuation.

Yes, overpaying for a stock doesn’t make sense.

But I think many investors don’t realise that certain stocks can carry what seems like high valuations and still do very well over a long period of time.

Terry Smith is an investor I respect greatly.

He is the founder, CEO, and CIO (Chief Investment Officer) of Fundsmith, a fund management company based in the UK.

In his 2013 letter to Fundsmith’s investors, Smith wrote:

“We examined the relative performance of Colgate-Palmolive and Coca-Cola over a 30 year time period from 1979-2009. Why 30 years? Because we thought it was long enough to simulate an investment lifetime in which individuals save for their retirement after which they seek to live on the income from their investment. Why 1979-2009? We wanted a recent period and in 1979 it so happens that Coca-Cola was on exactly the same Price Earnings Ratio (“PE”) as the market – 10 and Colgate was a little cheaper on 7x.

The question we posed is what PE could you have paid for those shares in 1979 and still performed in line with the market, which we took as the S&P 500 Index, over the next 30 years?

We found the answer rather surprising – it was 36x in the case of Coke and 34x in the case of Colgate when the market was on 10x. Another way of looking at it is that you could therefore have paid a PE of 3.6x the market PE for Coke and 4.9x the market PE for Colgate in 1979 and still matched the market performance over the next 30 years.

The reason is the differential rate of compound growth in the share prices (to a large extent driven by growth in the earnings) of those companies over the 30 years. They compound at about 5% p.a. faster than the market. You may be surprised that this differential can have such a profound effect upon the outcome. It’s the magic of compounding.”

Rule 4: Don’t Use Leverage

The stock market can move in surprising ways more often than we imagine.

On 12 August 2019, Argentina’s key stock market benchmark, the Merval Index, fell by a stunning 48% in US-dollar terms.

That’s a 48% fall in one day.

According to investor Charlie Bilello, the decline was a “20+- sigma event.”

Mainstream finance theories are built on the assumption that price-movements in the financial markets follow a normal distribution.

Under this statistical framework, the 48% one-day collapse in the Merval Index should only happen once every 145,300,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 years.

For perspective, the age of the universe is estimated to be 13.77 billion years or 13,770,000,000 years.

If we invest using leverage, we may be ruined whenever stocks lurch violently in their unpredictable yet more-frequently-than expected manner.

Rule 5: Volatility is Normal

Volatility in stock prices is a feature of the stock market and not a bug.

I say this because even the stock market’s best winners exhibit incredible volatility.

We can see this in Monster Beverage, an energy drinks maker listed in the US.

Monster Beverage’s share price was up by 105,000% from 1995 to 2015, making it the best-performing stock in the US market in that timeframe.

In another column for the Motley Fool, Morgan Housel shared how often Monster Beverage had experienced sickening drops in its share price:

The truth is that Monster has been a gut-wrenching nightmare to own over the last 20 years [from 1995 to 2015]. It traded below its previous all-time high on 94% of days during that period. On average, its stock was 26% below its high of the previous two years. It suffered four separate drops of 50% or more. It lost more than two-thirds of its value twice, and more than three-quarters once.

Wharton finance professor Jeremy Siegel once said that “volatility scares enough people out of the market to generate superior returns for those who stay in.”

There really is nothing to fear about volatility.

It is normal.

Rule 6: Expect, but Don’t Predict

The financial markets are incredibly hard to predict.

So it’s important for me to stay humble.

What I do to handle the uncertain future is to expect.

The difference between expecting and predicting lies in our behaviour.

A look at history will make it clear that bad things — bear markets, recessions, natural disasters, diseases, wars — happen frequently.

But they’re practically impossible to predict in advance.

Six months ago, how many people would have even thought that a virus would end up crippling the global economy today?

If we merely expect bad things to happen from time to time while knowing we have no predictive power.

Our investment portfolios would be built to be able to handle a wide range of outcomes.

On the other hand, if we’re engaged in the dark arts of prediction, then we think arrogantly that we know when something will happen and we try to act on it.

Our investment portfolios will thus be suited to thrive only in a narrow range of situations — if things take a different path, our portfolios will be on the road to ruin.

Rule 7: Be Rationally Optimistic Over the Long Run

There are 7.8 billion individuals in our globe today.

And the vast majority of people will wake up every morning wanting to improve the world and their own lot in life.

This is ultimately what fuels the global economy and financial markets.

Miscreants and Mother Nature will wreak havoc from time to time.

We’re currently living through one such episode of Mother Nature’s wrath in the form of a coronavirus that mutated and became capable of infecting humans.

But I have faith in the collective positivity of humanity.

When things are in a mess, humanity can clean it up.

This has been the story of mankind’s and civilisation’s long histories.

And I won’t bet against it.

This article first appeared on The Good Investors and is part of a content syndication agreement between The Good Investors and Seedly.

The Good Investors is the personal investing blog of two simple guys, Chong Ser Jing and Jeremy Chia, who are passionate about educating Singaporeans about stock market investing.

If you have any questions about this stock and other stocks in general, why not head over to the SeedlyCommunity to discuss them with like-minded individuals?

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