Shares in UnitedHealth Group plunged on Thursday, their eighth straight day of declines, after a Wall Street Journal report on a purported criminal probe into alleged Medicare fraud.
Why it matters: The stock, a major Dow component, has now lost more than half its value since last December, when a key executive was shot and killed in broad daylight in New York City.
Since then the company has been under public pressure amid broader questions about the insurance industry, and this week its CEO stepped down abruptly.
By the numbers: UnitedHealth shares were down $56, or 18%, at $252 in mid-morning trade Thursday.
The stock traded north of $600 last December, before insurance unit leader Brian Thompson's killing in NYC.
Catch up quick: Late Wednesday, the Wall Street Journal reported the company was under criminal investigation for possible Medicare fraud.
UnitedHealth issued a statement calling the report "deeply irresponsible" and saying it had not been notified of the purported investigation.