From Beating the Street by Peter Lynch

25 Golden Rules
• Investing is fun, exciting, and dangerous if you don't do any work.
• Your investor's edge is not something you get from Wall Street experts.
It's something you already have. You can outperform the experts if you use your
edge by investing in companies or industries you already understand.
• Over the past three decades, the stock market has come to be dominated
by a herd of professional investors. Contrary to popular belief, this makes
it easier for the amateur investor. You can beat the market by ignoring the
herd.
• Behind every stock is a company. Find out what it's doing.
• Often, there is no correlation between the success of a company's operations
and the success of its stock over a few months or even a few years. In the long-term,
there is a 100 percent correlation between the success of the company and the
success of the stock. This disparity is the key to making money; it pays to
be patient, and to own successful companies.
• You have to know what you own and, why you own it. "This baby is
a cynch to go up!" doesn't count.
• Long shots almost always miss the mark.
• Owning stocks is like having children- don't get involved with more
than you can handle. The part-time stockpicker probably has time to follow 8-12
companies, and to buy and sell shares as conditions warrant. There don't have
to be more than 5 companies in the portfolio at any one time.
• If you can't find any companies that you think are attractive, put your
money in the bank until you discover some.
• Never invest in a company without understanding its finances. The biggest
losses in stocks come from companies with poor balance sheets. Always look at
the balance sheet to see if a company is solvent before you risk your money
on it.
• Avoid hot stocks in hot industries. Great companies in cold, non-growth
industries are consistent big winners.
• With small companies, you're better off to wait until they turn a profit
before you invest.
• If you are thinking about investing in a troubled industry, buy the
company with staying power. Also, wait for the industry to signs of revival.
Buggy whips and radio tubes were troubled industries that never came back.
• If you invest $1,000 in a stock, all you can lose in $1,000, but you
stand to gain $10,000 or even $50,000 over time if you're patient. The average
person can concentrate on a few good companies while the fund manager is forced
to diversify. By owning too many stocks, you lose this advantage of concentration.
It takes only a handful of big winners to make a lifetime of investing worthwhile.
• In every industry and every region of the country, the observant amateur
can find great growth companies long before the professionals have discovered
them.
• A stock market decline is as routine as a January Blizzard in Colorado.
If you are prepared, it can't hurt you. A decline is a great opportunity to
pick up the bargains left behind by investors who are fleeing the storm in panic.
• Everyone has the brainpower to make money in stocks. Not everyone has
the stomach. If you are susceptible to selling everything in a panic, you ought
to avoid stocks and stock mutual funds altogether.
• There is always something to worry about. Avoid weekend thinking and
ignore the latest dire predictions of the newscasters. Sell a stock because
the company's fundamentals deteriorate. Not because the sky is falling.
• Nobody can predict interest rates, the future direction of the economy,
or the stock market. Dismiss all such forecasts and concentrate on what's actually
happening to the companies in which you've invested.
• If you study 10 companies, you'll find 1 for which the story is better
than expected. If you study 50, you'll find 5. There are always pleasant surprises
to be found in the stock market - companies whose achievements are being over
looked by Wall Street.
• If you don't study any companies, you have the same success buying stocks
as you do in a poker game if you bet without looking at your cards.
• Time is on your side when you own shares of superior companies. You
can afford to be patient - even if you missed Wal-Mart in the first five years,
it was a great stock to own in the next five years. Time is against you when
you own options.
• If you have the stomach for stocks, but neither the time nor the inclination
to do the homework, invest in equity mutual funds.
• Among the major stock markets of the world, the US market ranks eight
in total return in the past decade. You can take advantage of the faster growing
economies by investing some portion of your assets in an overseas fund with
a good record.
• In the long run, a portfolio of well-chosen stocks and/or equity mutual
funds will always outperform a portfolio of bonds or a money-market account.
In the long run, a portfolio of poorly chosen stocks won't outperform the money
left under the mattress.