The president is but one part of the government, which accounts for less than a quarter of the economy, though obviously it has a huge impact on markets and the broader economy through foreign policy, regulations, tax policy and spending.
Yes, Donald Trump can and will affect the economy and the markets.
But we should not put all of our focus on the marginal impact of the president while giving short shrift to more important things such as corporate revenue and earnings, the Federal Reserve, interest rates, inflation, retail sales, Congressional spending, employment, US Supreme Court decisions and valuations.
Like all presidents, if he does good things it will be supportive of the markets; if he commits major errors -- such as starting a trade war or gets the US into a serious shooting war -- it is detrimental.
Why is the market rallying when some predicted stocks would fall if Trump were elected?
One explanation for the market's post-election enthusiasm for Trump was based on expectations of tax reform, tax cuts, infrastructure spending and deregulation. However, that was a post-hoc narrative.
The simple fact that markets in Germany, France and Japan rose more than in the US since the election suggests that something else is at work.
My explanation is that the global recovery from the financial crisis continues apace, slowly repairing and rebuilding from that event. If you insist on singling out an explanation for why global markets are rising, look no further than the robust recovery in corporate earnings, especially in Europe.
As for forecasts of a Trump crash, that -- like most others -- was simply wrong.
How can you say politics doesn't matter to markets?
Let me be precise: Politics can and occasionally does matter to markets -- just much less than many people assume.
If I told you the president was going to be impeached, and the markets will continue to power higher for a few years, you might think I was batty. But that is what happened when Bill Clinton was impeached in 1998.
The next year, the Standard & Poor's 500 Index rose more than 21 per cent, and the Nasdaq Composite Index gained more than 85 per cent. Yes, it would all end badly the next year, but the impeachment was irrelevant to the dot-com bubble popping. So too was the accusation that President Barack Obama was a Kenyan-born, Marxist who was hellbent on "Killing the Dow," as a Wall Street Journal said in a 2009 commentary.
No one can really ignore the president of the United States, but it's probably best to view much of what he says or tweets as minor background noise.
When he left office earlier this year, the Dow was about 15,000 points higher than the day he took office. And when President George W. Bush introduced unfunded tax cuts, all I heard were complaints that the deficit would balloon, inflation would soar and jobs would be wiped out. Two of those three things never happened and the market rose 94 per cent.
If you let your political ideology get in the way of your investing decisions, the results are never pretty.
The Trump news flow is overwhelming. What should we do?
I think we all hoped that once the election was over, we could go back to our normal lives without the incessant parade of campaign news.
No such luck.
Investors need a way to sequester the noisy news flow out of the White House. It is too easy to let the relentless and disturbing headlines throw off long-term financial plans. Investors must read the news, but not let it interfere with thinking clearly.
Look, let's be honest about the commander-in-chief: He is the world's leading Twitter troll, a man whose main goal is to interrupt your thinking, misquote and insult other people, engage in rhetorical sleight of hand, and impugn the integrity of those trying to do honest work. What all trolls want is a reaction, something Trump has achieved to great success.
Rule #1 on the internet is "Do not feed the trolls."
No one can really ignore the president of the United States, but it's probably best to view much of what he says or tweets as minor background noise.
You keep saying not to worry about who is president; but surely you do worry about him, right?
Yes, as a citizen I do worry about the president's rampant prevarications and the degraded culture he has created.
The search for facts and reliable information is the bedrock of modern civilization and well-functioning markets. Upending this is dangerous and worrisome. I have no interest in returning to the dark ages before the Enlightenment. But that seems to be the direction in which we're headed, and some people seem to think it will make them the most money.
They likely won't and now more than ever, truth remains the best disinfectant.
Ritholtz is a Bloomberg View columnist. He founded Ritholtz Wealth Management and was chief executive and director of equity research at FusionIQ, a quantitative research firm. He blogs at the Big Picture and is the author of "Bailout Nation: How Greed and Easy Money Corrupted Wall Street and Shook the World Economy."
