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Who’s keeping you honest?

New York Times columnist Carl Richards has a great saying. A financial advisor, Richards says, is someone who puts a gap between you and stupid. The smartest investors in the world are tempted to do dumb things with your money. An advisor’s job is to look you in the eye, shake their head, and walk you back from the ledge.

Every investor needs someone like this. But how many of us have one? Few. Most of us have the opposite. We seek out people who agree with our ideas, cheering us on and holding our hands straight off the stupid cliff.

Keep that in mind, and meet David Rosenberg.

When the facts change

Rosenberg is an economist with Gluskin Sheff in Canada. He’s on TV a lot, is usually pessimistic, and has somewhat of a cult following among bears. A lot of his calls were wrong in hindsight, given the five-year bull market. That’s nothing against Rosenberg. He seems like a smart guy. Forecasting is just hard.

Now Rosenberg is changing his tune. He’s turning more bullish on stocks and the economy.

Some of Rosenberg’s clients are furious. Why? Not because his timing was off, but because he changed his mind at all.

“Cancel my account, and tell Dave I don’t recognise his work,” one client wrote, according to The Wall Street Journal. “He used to be the straightest shooter out there … it is too much for me to have another cheerleader,” wrote another.

These clients weren’t paying Rosenberg to analyse the economy and provide an objective forecast. They were paying him to confirm their pessimism. Now that he’s bullish, they want nothing to do with him.

“I’m finding out that a lot of my loyal readers were never really interested in my analysis,” Rosenberg said last week. Next stop, Stupidville!

I like you when you agree with me

There’s a name for this: confirmation bias. It’s the tendency to seek out and glorify information that supports our existing beliefs, and ignore and discredit information that goes against them.

It’s incredibly powerful. During the 2004 US presidential election, psychologist Drew Westen of Emory University and his colleagues studied the brains of 15 “committed” Democrats and 15 “committed” Republicans with an MRI scanner. Each group was shown a collection of contradictory statements made by George W. Bush and John Kerry. Not surprisingly, the partisans were quick to call out contradictions made by the opposing party, and made up all kinds of justifications to rationalise quotes made by their own side’s candidate.

But here’s what’s scary: The participants weren’t just being stubborn. Westen found that areas of their brains that control reasoning and logic virtually shut down when confronted with a conflicting view of their preferred candidate. He explained in the book The Political Brain:

When confronted with potentially troubling political information, a network of neurons becomes active that produces distress… The brain registers the conflict between the data and desire and begins to search for ways to turn off the spigot of unpleasant emotion. We know that the brain largely succeeded in this effort, as partisans mostly denied that they had perceived any conflict between their candidate’s words and deeds…

Once partisans had found a way to reason to false conclusions, not only did neural circuits involved in negative emotions turn off, but circuits involved in positive emotions turned on. The partisan brain didn’t seem satisfied in just feeling better. It worked overtime to feel good, activating reward circuits that give partisans a jolt of positive reinforcement for their biased reasoning.

The biases that cause people to write off an opposing politician while defending their own is the same one causing David Rosenberg’s clients to flee. In each case, people aren’t looking for someone who can reason and think rationally. They just want someone to confirm whatever they already believe. In a constantly changing world, this is one of the surest routes to deception and bad decisions.

Take action – find someone who disagrees

So, what can we do about it?

Follow Carl Richards’ advice. Find someone who puts a gap between you and stupid.

I think one of the best things anyone can do in investing is find someone who disagrees with your views. If you’re a bear, find a bull. If you like bonds, find someone who doesn’t. Seek them out and make them your best friend. Spend more time with them than the people who agree with you. Listen to them carefully. Take what they say seriously. That’s especially important when the <IPO marketing machine> (http://www.fool.com.au/2013/10/25/have-i-got-a-deal-for-you/) is in full swing!

This is devilishly hard. But when you force yourself to do it, you will be shocked at how much more you learn from people who disagree with you than those who share your views. It forces you to accept that things are usually more complicated than your gut reaction makes them out to be.

Foolish takeaway

I used to be in the hyperinflation, US-dollar-is-going-to-crash camp until I forced myself to read the other side of the argument and realised it made more sense. Assured the financial crisis would doom the economy, I was once tempted to sell most of my stocks in late 2008 until a friend walked me through the history of the Great Depression, noting that stocks did spectacularly well for those who stuck it out. In both cases it was hard to listen to the views of someone I fervently disagreed with. But in both cases, the other side was right. I’m so glad they put a gap between me and stupid.

Try it yourself.

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