(Reuters) - Apple (AAPL.O) on Tuesday fell 3% to a seven-week low after Barclays downgraded the shares of the world's most valuable firm on concerns that demand for its devices from the iPhone to Mac will remain weak in 2024.

Barclays is the second brokerage to have the equivalent of a "sell" rating on the stock, which now has its most number of bearish recommendations in at least two years, per LSEG data.

Apple has been grappling with a demand slowdown since early last year and has forecast holiday-quarter sales below Wall Street estimates. Its performance in China has also been a worry after the revival of local rival Huawei.

"The iPhone 15 has been lackluster and we believe iPhone 16 should be the same," Barclays analyst Tim Long said in a client note, pointing to the China weakness as well as subdued demand in developed markets.

The brokerage also warned risks were mounting for Apple's services business, which has come under the scanner in countries including the United States over app store practices.

Long is rated four out of five stars for his recommendation accuracy on Apple, according to LSEG data.

The business has often outpaced growth in Apple's hardware segment in recent years and now accounts for nearly a quarter of the company's total revenue.

The shares drop on Tuesday was set to erase about $90 billion from Apple's market capitalization. The stock that accounts for a hefty 7% of S&P 500's weight rose nearly 50% in 2023 and hit a record high in mid-December amid a wider rally in Big Tech stocks.