What will be considerably more difficult – and potentially much more profitable – is predicting which merchants will be affected the most by the decline in the size of Facebook’s pool of marketing data on its users.

With a billionaire now in the White House, it’s worth examining how the world’s “super investors” achieved their vast wealth. Here are practical lessons for entry into this exclusive circle.

The main stock indices fell today, as the yield on the 10-year Treasury bond jumped higher. Expectations are increasing that hotter inflation will prompt the Federal Reserve to more aggressively boost interest rates.

Short sellers on average are some of the smartest investors, so investors that buy heavily-shorted stocks are assuming additional risk. After thoroughly analyzing the stock's business prospects, traders can buy puts if they agree with the short sellers' pessimism and buy calls if they disagree.

Wall Street today exacted a toll for less-than-perfect operating results. The Dow Jones Industrial Average fell while the S&P 500 and Nasdaq inched higher, in volatile trading.

Sooner or later, the discrepancy between Walgreens’ superior fundamentals and its lagging share price must be reconciled.

The newly passed tax code is delivering huge tax savings to many domestic companies. Lower taxes means increased earnings growth. But how will investors view the one-time boost delivered from lower tax rates?

Investors today shifted focus from geopolitical worries to strong corporate earnings. The major stock indices climbed higher, as operating results lifted Wall Street’s mood.

Oil company stocks are moving higher, but they are lagging the 50% gain in the price of oil over the past eight months. 

The main indices closed in the green today, amid high earnings expectations. But excessive optimism could breed disappointment.

Writing options can be a low-risk way to generate extra income and boost a portfolio's return. However, investors should be careful not to go overboard and write too many options at once.

Bank bellwethers posted respectable operating results today, but for Wall Street, the report cards weren’t good enough. The three main stock indices sharply fell in volatile trading.

You can build a portfolio that generates monthly income with just a dozen dividend stocks. But there’s another way that gives you even greater control over how much and how often you get paid—and it also helps lower risk too.

President Trump today backed away from confrontation with Syria. The main indices jumped, as investors brushed off war worries to focus on positive earnings.

Here are three ways to estimate what stocks are really worth after a correction.

Geopolitical risk worsened today to tank the markets, as the U.S. threatened airstrikes against Syria. Dysfunction in Washington, DC also spooked investors.

Regardless of your relationship with your mother, cash is an integral part of risk management in any portfolio. With interest rates stretching upward investors finally have some low-risk options for storing cash.

Chinese President Xi Jinping today offered surprisingly conciliatory words on trade, avoiding further war on tariffs. The main indices surged in a relief rally.

Volatility has returned to the market after a nine-year absence. Investors can use that volatility to pick up quality companies at discount prices. 

Wall Street put aside trade fears today to focus on first-quarter operating results. Optimism reigned over corporate profits, pushing the main indices into the green. But late-breaking political news eroded gains in the final minutes of trading.