Covid-19 has forced epidemiology and economics to become intertwined as never before.

As small businesses across the country grapple with economic reopening, one of their biggest fears is that new regulations will be a net negative for post-Covid-19 Main Street.

We do not know how long investors will be patient, how long markets will rise on the policy response, how low the economic numbers will fall and for how long.

Siemens on Friday said it expected "even stronger impacts" from the coronavirus pandemic in the weeks ahead as it ditched its 2020 guidance and posted an 18% drop in industrial profit during its second quarter.

Katie Miller, the Pence press secretary, also handled communications for the coronavirus task force. The news came a day after the revelation that a personal valet for President Trump tested positive.

Washington's commitment to the security of its Gulf allies is unchanged despite what appears to be a shift in force posture in the region, U.S. Special Representative for Iran Brian Hook told CNBC.

The coronavirus outbreak in the Middle East is likely to remain under control despite the easing of restrictions in recent weeks, as long as strict social distancing continues to be enforced, experts told CNBC.

Sweden's decision to avoid a strict lockdown like its European neighbors drew global attention and was not without controversy, but its chief epidemiologist says there are few things he would have done differently.

Russia is now the world's fifth-most infected country with more than 187,800 cases, surpassing Germany and France, according to data from Johns Hopkins University.

The United States issued a new rule on Friday tightening visa guidelines for Chinese journalists — a shift that comes amid tensions between the two nations over the coronavirus global pandemic.

Britain is to introduce a 14-day quarantine period for almost everyone arriving into the country to avoid a second peak of the coronavirus pandemic, The Times newspaper reported on Saturday.

Covid-19 has infected more than 3.8 million people around the world as of Friday, killing at least 269,881 people.

China is likely to use the crisis as an opportunity to raise its profile and expand its influence particularly over countries hard-hit by the pandemic, analysts say.

Stocks are breaking out to new all-time highs, but one trader is betting that more volatility is right around the corner.

One options trader is betting on a solid gold rally for the yellow metal into late spring.

A look at Microsoft after earnings. With CNBC's Melissa Lee and the Options Action Traders, Carter Worth, Mike Khouw and Tony Zhang.

It's difficult to make predictions for the stock market amid the uncertainty of the coronavirus. Investors look towards previous trends for guidance. Nearly six months away from the 2020 presidential election, the market typically performs a certain way during election cycles.

Uber will lay off 3,700 employees, the company announced in a filing with the Securities and Exchange Commission Wednesday. The cuts to its customer support and recruiting teams represent about 14% of its 26,900 employees, based on Uber's most recent headcount. CEO Dara Khosrowshahi will also forgo his base salary for the rest of the year, which was $1 million in 2019.

CNBC's Jim Cramer said Thursday that he has gained confidence in Moderna's potential coronavirus vaccine due to recent comments from Dr. Anthony Fauci.

Albright Stonebridge Group Chair Carlos Gutierrez and CNBC's Rick Santelli discuss technology in the covid-19 era, global supply chains and economic decoupling.

Virgin Atlantic announced it will cut 3,150 jobs, becoming the airline to announce a reduction in headcount because of the coronavirus crisis.

In February, the European Commission estimated a 1.4% rise in GDP for the EU this year.

"This situation makes me sick, because (it) is totally avoidable," Lucica Ditiu, executive director of the Stop TB Partnership, said.

Greece might be spared from having to hit strict fiscal targets related to previous bailouts next year, a government official told CNBC, given the ongoing health and economic crises.

Gerard Lyons tells CNBC there is too much fear about leaving the EU without a deal.

Consumers reined in spending faster than expected in the first quarter, probably even before states issued stay-at-home orders.

Check out the companies making headlines in midday trading.

About 4 million workers could have filed for unemployment benefits last week, bringing total claims above 30 million in just six weeks.

These are the stocks posting the largest moves in midday trading.

Never before has the U.S. fallen into a recession led by the services sector, so there is no real road map for the recovery.

Starbucks jumps as the coffee chain rolls out a reopening plan in the U.S. while Chevron leads energy stocks higher amid a surge in crude.

Check out the companies making headlines in midday trading.

The number of continuing jobless claims rose to a greater-than-expected 22.6 million last week, signaling April job losses over 20 million.

April's jobs report will be horrific, and with the worst job losses ever, it should provide a critical look into the economy's collapse.

The S&P 500 may be headed for a long, slow sideways pattern, and that's good for traders, according to Daryl Guppy.

The pullback in oil prices takes place within the environment of a well-established uptrend, writes Daryl Guppy.

Aggressive traders are starting to enter the Shanghai market in anticipation of a trend change, writes Daryl Guppy.

Roth accounts may make sense for a larger number of Americans due to low historical income-tax rates and the U.S. budget deficit, which some experts believe will necessitate the government raising tax rates in the future.

Democratic presidential contender Michael Bennet wants to increase the top income-tax rate paid by the wealthiest Americans to 44%, which experts say exceeds that of other presidential hopefuls to date.

Mike Bloomberg is taking aim at President Trump with a TV ad buy that could be worth $10 million. Bloomberg's plan to run an ad during the National Football League's most watched game of the season comes as he focuses his attention on the delegate-rich Super Tuesday states. Their primaries are scheduled for March 3.

Mike Bloomberg is outspending his rivals in the race to become the 2020 Democratic Presidential Nominee. His campaign spent $188 million during the fourth quarter of 2019. That's more money than any of his democratic competitors have raised over the entirety of this election cycle. But there's another big difference between those candidates and Bloomberg. Bloomberg didn't compete in the Iowa caucuses. Here's why and how he may still qualify for upcoming debates.

New York City businesses are struggling to make money and retain workers as the coronavirus continues to inflict economic pain.

Millions of small businesses will close permanently if disruption caused by the coronavirus pandemic persists, according to a new survey from Main Street America.

Michael Binetti, Credit Suisse Analyst, joins "Closing Bell" to discuss markets.

CNBC's Phil LeBeau reports the latest news on Tesla.

Mistakes happen. CNBC asked advisors from firms that made the FA 100 list what the worst money misstep they've ever seen a client or other investor make was.

There may be no free lunch in the financial services industry, but there is now free trading of stocks, exchange-traded funds and options as custodians eliminate commissions for retail and financial advisor clients.

While institutional investors have pulled more than $3 billion from the Camas, Washington-based firm in the wake of Ken Fisher's comments, retail clients have had a more muted reaction. Here's why individual investors may be slow to divest.

Financial advisors are turning to a variety of options to help clients prepare for the potential cost of help with daily activities like eating and dressing — otherwise known as long-term care.

Investors aren't the only ones watching Charles Schwab's acquisition of TD Ameritrade. Registered investment advisors also want to know what this smaller field of custodians means for their firms and the clients they serve.