There was a chance that Apple would be delisted from the NASDAQ, which is never good for a company's stock. The issue stemmed from the investigation of options irregularities which forced Apple to restate earnings. This, in turn, delayed the filing of some paperwork, a 10Q form to be exact, therefore leading to possible delisting.
Luckily, the NASDAQ stated that they will not delist Apple as long as the company files their 10Q within 2 months. Peter Oppenheimer, Apple CFO, says that if Apple is unable to meet that deadline they will file for an extension.
[via the Mac Observer]