The video game retailer's shares shoot up, the online broker Robinhood struggles for cash and securities regulators issue a stern warning for anyone trying to game the market.

GameStop has seen its stock soar, driven higher by a group of amateur day traders on Reddit, who are taking on Wall Street hedge funds. The frenzy has gotten the attention of regulators and lawmakers.

The Dow, S&P 500 and Nasdaq all hit new records as markets closed on Wednesday. Former President Donald Trump frequently cited stock market gains as a personal accomplishment.

The short-tem rental company says it's actually seeing an increase in its business because people are less inclined to stay at hotels and are choosing to "work from any home" during the pandemic.

Markets welcomed President Trump's recommendation the transition process begin, which will provide critical resources and information to President-elect Joe Biden's team.

Investors were also reassured by comments from two Biden advisers that no nationwide COVID-19 lockdowns are being contemplated.

The Dow tumbled more than 900 points as COVID-19 cases surge in the United States and Europe, while next week's election is only adding to the uncertainty over the economy.

Investors are also discouraged by the lack of progress in talks between Congress and the White House over another coronavirus relief bill.

Stocks reversed Tuesday's losses amid word that the Trump administration was considering stand-alone bills to aid airlines and small businesses. The president had called off talks on a relief bill.

The Dow falls more than 500 points as a report says large global banks were involved in transactions flagged as possible money laundering and hopes dim for Congress to pass another relief measure.

Moderna is currently developing a promising, yet still unproven, vaccine against the coronavirus. But Moderna executives have already sold tens of millions of dollars worth of stock in the company.

Apple's stock split is the cause of the shake-up at the Dow Jones Industrial Average. But the symbolic shift also represents how Exxon, once a corporate titan, has diminished in stature.

The market is hitting records, in large part because of a handful of superstar tech stocks. Apple, Amazon, Microsoft, Facebook, Netflix and Google's parent dominate indexes in retirement funds.

Apple first crossed the $1 trillion mark just two years ago. The iPhone maker and a handful of other tech giants propelled the S&P 500 index to a new record this week.

After plummeting 34% from its prior peak, the stock index has staged a steady recovery — gaining more than 50% since March, when lockdowns shut down much of the economy.