The major indexes have stretched to all-time highs and are riding one of their best first halves in decades.Trading Nationread more
The brokerage says that the globe is "one step away" from recession as the world's two largest economies head to the G-20 summit.Marketsread more
As candidates from Elizabeth Warren and Bernie Sanders to John Delaney jockey for position in the 2020 Democratic primary, business issues will come up in the first debates.2020 Electionsread more
President Trump issues an executive order that would pressure insurers, doctors and other providers to disclose more information about health-care prices.Health and Scienceread more
Sen. Bernie Sanders will announce a plan on Monday to forgive the country's $1.6 trillion outstanding student loan tab, intensifying the higher education policy debate in the...Personal Financeread more
J.P. Morgan analyst Stephen Tusa is sticking to his guns when it comes to General ElectricInvestingread more
The Supreme Court on Monday announced that it will not hear a challenge to President Donald Trump's tariffs on steel imports into the United States.Politicsread more
A bipartisan team of senators introduce the Dashboard Act to make social media companies disclose the value of user data.Technologyread more
Trump says he would impose additional sanctions against Iran in a bid to prevent the country obtaining nuclear weapons.World Politicsread more
The prospect of another military conflict in the Middle East prompted international benchmark Brent crude to climb around 5% last week.Energyread more
Here are the biggest calls on Wall Street on MondayInvestingread more
TransDigm shares dropped more than 4 percent on Wednesday and had a 5.5 percent loss on Tuesday following Khanna's call for an investigation.
TransDigm did not immediately reply to CNBC's request for comment.
A member of the House Committee on Armed Services, Khanna sent a letter to the Defense Department's acting inspector general urging him to determine if the company is operating as a "hidden monopolist."
In his letter, Khanna said TransDigm may be bypassing rules that protect U.S. taxpayers since the manufacturer conducts business with the Pentagon. He said he wants to make sure the company is not adding unnecessary costs to the U.S. taxpayer and is not contributing to the $54 billion increase in defense spending proposed by the Trump administration.
Khanna told CNBC his goal is a congressional hearing.
The price of TransDigm closed at $237.94 per share on Monday and traded for as low as $213.87 on Wednesday.
Brokerage firm Cowen & Company downgraded the stock on Tuesday to a "hold" rating with a price target of $219.
Shares of TransDigm 6-month performance.
With Wednesday's declines, TransDigm shares are down nearly 25 percent in the last 6 months.
— CNBC's Seema Mody contributed to this report.