Sabedoria do mercado

Artigo de 2008:https://www.marketwatch.com/story/ten-investing-rules-that-will-help-you-weather-this-stormy-market?print=true&dist=printMidSection

Over several decades at brokerage giant Merrill Lynch & Co., Bob Farrell had a front-row seat to the go-go markets of the late 1960s, mid-1980s and late 1990s, the brutal bear market of 1973-74, and October 1987's crash. Out of those and other experiences came Farrell's 10 "Market Rules to Remember."

1. Markets tend to return to the mean over time
By "return to the mean," Farrell means that when stocks go too far in one direction, they come back. If that sounds elementary, then remember that both euphoric and pessimistic markets can cloud people's heads.

"It's so easy to get caught up in the heat of the moment and not have perspective," says Bob Doll, global chief investment officer for equities at money manager BlackRock Inc. "Those that have a plan and stick to it tend to be more successful."

2. Excesses in one direction will lead to an opposite excess in the other direction
Think of the market as a constant dieter who struggles to stay within a desired weight range but can't always hit the mark.

"In the 1990s when we were advancing by 20% per year, we were heading for disappointment," says Sam Stovall, chief investment strategist at Standard & Poor's Inc. "Sooner or later, you pay it back."

3. There are no new eras -- excesses are never permanent
This harkens to the first two rules. Many investors try to find the latest hot sector, and soon a fever builds that "this time it's different." Of course, it never really is. When that sector cools, individual shareholders are usually among the last to know and are forced to sell at lower prices.

"It's so hard to switch and time the changes from one sector to another," says John Buckingham, editor of The Prudent Speculator newsletter. "Find a strategy that you believe in and stay put."

4. Exponential rapidly rising or falling markets usually go further than you think, but they do not correct by going sideways
This is Farrell's way of saying that a popular sector can stay hot for a long while, but will fall hard when a correction comes. Chinese stocks not long ago were market darlings posting parabolic gains, but investors who came late to this party have been sorry.

5. The public buys the most at the top and the least at the bottom
Sure, and if they didn't, contrarian-minded investors would have nothing to crow about. Accordingly, many market technicians use sentiment indicators to gauge investor pessimism or optimism, then recommend that investors head in the opposite direction.

Some closely watched indicators have been mixed lately. At Investors Intelligence, an investment service that measures the mood of more than 100 investment newsletter writers, bullish sentiment rose last week to 44.8% from 37.9% the week before. Bearish sentiment slipped to 31.1% from 32.2%. Meanwhile, the American Association of Individual Investors survey was less positive, with bearish sentiment at 45.8% and bulls at 31.4%
(Nota do bochan: Este artigo é de Junho 2008, pouco antes do crash).

6. Fear and greed are stronger than long-term resolve
Investors can be their own worst enemy, particularly when emotions take hold.

Stock market gains "make us exuberant; they enhance well-being and promote optimism," says Meir Statman, a finance professor at Santa Clara University in California who studies investor behavior. "Losses bring sadness, disgust, fear, regret. Fear increases the sense of risk and some react by shunning stocks."

After grim trading days like Friday's nearly 400-point tumble, coming after months of downward pressure on stocks, it's easy to think you're the patsy at this card table. To counter those insecure feelings, practice self-control and keep long-range portfolio goals in perspective. That will help you to be proactive instead of reactive.

"It's critical for investors to understand how they're cut," says the Prudent Speculator's Buckingham. "If you can't handle a 15% or 20% downturn, you need to rethink how you invest."

7. Markets are strongest when they are broad and weakest when they narrow to a handful of blue-chip names
Markets and individual sectors can move in powerful waves that take all boats up or down in their wake. There's strength in numbers, and such broad momentum is hard to stop, Farrell observes. In these conditions you either lead, follow or get out of the way.

When momentum channels into a small number of stocks, it means that many worthy companies are being overlooked and investors essentially are crowding one side of the boat. That's what happened with the "Nifty 50" stocks of the early 1970s, when much of the U.S. market's gains came from the 50 biggest companies on the New York Stock Exchange. As their price-to-earnings ratios climbed to unsustainable levels, these "one-decision" stocks eventually sunk.

(nota do bochan: Já viram como o SP500 está incrivelmente concentrado nas tais FAANG ?)

8. Bear markets have three stages -- sharp down, reflexive rebound and a drawn-out fundamental downtrend
Is this a bear market? That depends on where you draw the starting line. With Friday's close, the S&P 500 Index SPX, -0.82% is down 13.1% since its October 9 peak. Not the 20%-plus decline that typically marks a bear, but a vicious encounter nonetheless.

Where are we now? A chart of the S&P 500 shows a couple of sharp downs and subsequent rebounds in the past six months, with a tighter trading range since April. It remains to be seen if we can avoid a tortured period of the kind seen from 2000 to 2002, when sporadic rallies couldn't snap a slow, protracted decline.

9. When all the experts and forecasts agree -- something else is going to happen
As Stovall, the S&P investment strategist, puts it: "If everybody's optimistic, who is left to buy? If everybody's pessimistic, who's left to sell?"

Going against the herd as Farrell repeatedly suggests can be very profitable, especially for patient buyers who raise cash from frothy markets and reinvest it when sentiment is darkest.

10. Bull markets are more fun than bear markets
No kidding.