A year ago, Apple said it would end its $7 billion buyout of Beats Electronics, ending the $25 billion acquisition of the music streaming company.
That move, announced on Jan. 31, prompted investors to rush to buy Apple stock, a move that would help drive its stock price higher.
But on Monday, the company’s stock is down about 20 percent from its all-time high.
The drop is the biggest one-day percentage drop since the start of the year.
And it comes after Apple announced on Monday that it had signed a deal to sell the Beats business for $2.5 billion to Samsung Electronics.
That deal was announced last month and was valued at about $2 billion.
But the new deal between Apple and Samsung, which will see Apple take control of the electronics giant’s smartphone business, is far more significant for Apple than the deal with Beats.
Samsung will get a controlling stake in Beats and make the music subscription service that Apple uses.
The stock price is now trading at $13.60 a share, down from $26.50 a share on Tuesday.
Apple shares are up about 12 percent in the past year, and the company has seen a $100 billion valuation.
But what happens to Apple stock when it does end the Beats deal?
Investors would expect that Apple would sell more stock to support the stock price, which is up about $10 billion over the past 12 months.
The deal with Samsung could also affect Apple’s stock price if the deal goes through.
Analysts have predicted that Apple could sell its remaining Beats stock to help pay for the purchase.
Apple also is buying other companies, including the maker of the iPhone, the maker and the maker’s smartphone.
The companies are expected to announce a new iPhone later this month, which could also boost Apple’s market share.
Analysts say Apple will be able to benefit from the new acquisition if the Beats agreement goes through, as it could create a more competitive smartphone.