KEY POINTS
  • Apple gave a sudden warning to investors on Wednesday afternoon, lowering its first-quarter revenue guidance.
  • "Biggest miss in years," Jefferies says in a note to investors.
  • Oppenheimer says Apple's announcement "raises more questions than answers."

Major Wall Street analysts slashed price targets on Apple after the iPhone marker gave a sudden warning to investors, lowering its first-quarter revenue guidance on factors including China's weakening economy.

Jefferies and Macquarie each threw in the towel and downgraded the stock to a neutral rating from buy.