Just goes to show you that today’s politics affects the stock market more than the fundamentals of economics. Short term traders make fortunes on that fact. It’s the reality of an unfree-market.
The answer to your question is yes, in short term spurts. Predicting and guiding the winds of politics is the new investing style, That’s where the real money is.

If the stock market was actually a reflection of the economy in general, it wouldn't matter what President Trump tweeted. The fact that a tweet or post can make the algorithms which control the trading act unstably is all I need to know.

The best advice I ever got for the stock market was when I had a retail store in a little town around the corner from a local bank. The president of the bank told me "If you are middle class only invest money you can afford to lose in the stock market."Instead of a new car, put it off a year and all you've lost is the use of a new car for a year, and if you make money, you can get a better car next year."

Maybe start with Sun Tsu's "The Art of War" and "The Power of Positive Thinking". Trump is/was a student of both. Norman Vincent Peale officiated Trump's first wedding.

The stock market is no place for those with limited resources and faint at heart. When the claims from some crack whore can send the market in a tail spin that should be your first clue. Those who can afford to play and both win and lose are legal gamblers and welcome to what ever their results may be. I do wish I had both the knowledge and stomach for it.

Rational investors dont use the irrational stock market. Its an emotional market based on the greater fool theory, who will buy the stocks you own at a higher price- and that price is far beyond whatever is justified by the fundamentals of the company

The only President who tells the truth MAGA.
He is taking shots from the deep state daily and has been brilliant . The Uncivil war rages . With half of Satanist Valley I mean Silicon Valley conspiring to destroy America with the treasonous Obama /Clinton . After a shap run up the markets first swoon happened the day the Nunes memo on the FISA / FBI / DOJ sedation in the US Govt.
Mkt down. - 1400 . A new sherif is in town. In his sights are .... You know because he has already told us. The MSM will not guide you to the light.
Now back to Stormy Daniels.

maybe if Trump understood philosophy, reason, and rationality, he could better understand what to do...

actually the tariff on a new Chinese made car to the U.S. is 2.5%...the tariff on a new American made car to China is 25%...that is a war...and the Chinese need to be made to understand that...

missiles pointed at the U.S. by North Korea are supplied by China and Russia...that is a war by China and Russia...they both need to know that the first missile fired by the U.S. in retaliation will be to Peking and Moscow...and the world needs to know this...

announce an immediate total embargo of anything made in China until all tariffs and missiles are removed...then we can go forward from there...

and in addition to building a wall with Mexico...how about valuing American lives and build a defense against any and all missiles....

and the crossing of the border from Mexico constitutes an invasion by the Mexican govt and act of war...end the Mexican govt...make them another territory...

just sugar-coating it...

When a Trump or Hillary Clinton tweets something about a certain stock you can bet your bottom dollar they are rigging the system for themselves and their friends. I've seen massive fluctuations triggered by such tweets. Hillary has the record with her tweet on VRX a couple years ago. Nobody does that without first alerting their friends. Nobody...

Investor? The market is not about investing. It's about fleecing the public and stealing intellectual property. A small minority also make a living by trading artificial short term fluctuations. In my view that is done by those lacking in ethics or ignorant accomplices of evil. Actual free market production isn't a part of it either.

Trump tweets are a very interesting aspect of his personality. Being from New Jersey and read about Trump, then his 2016 presidential campaign I consider him a New York Junk Yard Dog. Just a lot of noise with some tendency to bite. The stock market should take it as such.

Short term fluctuations have nothing to do with investing. "Playing" the market is gambling, which is fine for those that want to but people that do not should take another approach. In the long run, diversified portfolios are the only passive investments that have a chance of earning a return greater than inflation. The urge to gamble can still be served in determining the ratio of stocks, bonds and cash equivalents.

As to Trump's motives, I don't think we have a clue what they are before the fact since he is willing to use any ruse to achieve his goals. I think that most of his tweets are set ups to confuse and manipulate his opponents. He wants them to believe anything, no matter how extreme, is not only on the table but he is considering seriously it. They know he is bluffing but they don't know where the line is. Everything he has achieved to date has been by using this tactic and he will continue to do it even if he has to go overboard occasionally to keep them guessing. Anyone that wants to use him as a means of making investments is a bigger gambler than me. I just need to know how much cash I need in reserve to avoid having to sell in a big down tick.

It goes without saying that you could profit from option trades by knowing even the probability of something that affects the market before other traders know. The key is figuring it out. Once someone finds the pattern, e.g. when the weather is rainy in Palm Beach he tends to say something radical on twitter, the market will beat you to it.

If you knew at certain times he's likely to tweet about something, you could buy at-the-money calls and puts on QQQ, with the idea any radical tweet will increase volatility (increasing time premium on calls and puts) and may move the market. I thought of Qs instead of AMZN b/c he's already picked on AMZN, and the volatility is probably already priced in. They key would be to open the position, and get out quickly if the tweet is not forthcoming, before you lose too much to time decay.