With the holidays in the rearview mirror, the new year brings hope and renewal. It's also a good time to turn the page and analyze whether you should buy, sell, or hold certain stocks.

Apple's (AAPL 0.06%) stock performed very well last year, with the share price increasing by 48%. That's about double the S&P 500's gain. If you owned the shares, that makes for a very happy new year.

But what should holders or prospective buyers do now? Examining the company's offerings and valuation will lead to an informed decision.

A hand holding an iPhone.

Image source: Getty Images.

New phones, lackluster boost

Apple generates most of its sales from iPhones. In the latest fiscal year, which ended on Sept. 30, 2023, iPhones accounted for 52% of its $383.3 billion of sales.

Management released the latest version last September. However, the iPhone 15 didn't provide a major boost to Apple's fourth-quarter top line. For the period, iPhone sales grew by 2.8% to $43.8 billion. CEO Tim Cook noted record iPhone sales in China and blamed supply issues for the tepid sales growth.

Nonetheless, data shows the device had been losing worldwide market share with strong competition from Huawei, among others. Additionally, China's government has limited iPhone usage by government employees.

Based on the number of shipments, iPhone's worldwide market share was 16% in the calendar year's third quarter compared to 23% at the end of 2022, according to Counterpoint. It dominates the U.S. market with an over 50% share.

Other products and services

Apple's offerings include Mac personal computers, iPads, smartwatches, wireless headphones, and a variety of services. They have generally produced lackluster sales. In the fourth quarter, iPhone, Mac, iPad, and wearables, home, and accessories had lower sales than a year ago.

Economic factors, such as stressed consumers dealing with overall higher prices, explain part of the weaker sales. However, there were also company-specific issues, such as a lack of new innovative products.

Management hopes to get a boost from Vision Pro, a mixed reality headset that it plans to release this year. The price tag, about $3,500, may prove challenging to buyers, though.

Services remain a bright spot, however. Apple's services include advertising, product support and repair, cloud, and payments. Fourth-quarter sales grew by over 16% to $22.3 billion. And the business has a much higher gross margin than the company's products. Last year, services had a 70.8% gross margin, nearly double products' 36.5%.

Valuation

The stock's large gain last year has created a more expensive valuation. The shares sell at a price-to-earnings (P/E) ratio of 30 compared to the low 20s a year ago. That's also higher than the S&P 500's P/E multiple of 26.

With a higher valuation comes the expectation of faster sales and earnings growth. However, I have questions about whether Apple's key iPhone product will resume higher sales growth and I'd like to see its other products reverse the negative sales trend. Despite services doing well, it's insufficient for me to buy the stock on that basis alone.

Given the stock price's run-up, I'd look to cash in and sell the shares.