Earnings season is in full swing, and all eyes are on the "Magnificent Seven" stocks. Apple (AAPL -1.02%) just hit the earnings tape with one major headline: a $110 billion stock buyback authorization. This is a notable announcement, as it marks the largest share buyback in U.S. corporate history.

Let's break down why stock buybacks are important, and analyze some of the other themes of Apple's earnings. After a thorough review of the report, you may want to think twice before scooping up shares of the iPhone maker.

Stock buybacks are great

The chart below illustrates Apple's stock buyback history over the last 10 years. Clearly, the company has done a stellar job returning capital to investors through a series of consistent stock buybacks:

AAPL Stock Buybacks (Quarterly) Chart

AAPL Stock Buybacks (Quarterly) data by YCharts.

One of the biggest reasons a company may purchase its own shares is because management views the stock as undervalued.

A more subtle reason why a company may repurchase stock is to increase earnings per share (EPS). This is where one of my suspicions and concerns comes into play.

Notecards that have the words Stock and Buyback written on them.

Image source: Getty Images.

But where is Apple's real growth coming from?

Below is a summary of Apple's annual revenue growth over the last several quarters:

  • Quarter ended Dec. 31, 2022: negative 5%
  • Quarter ended April 1, 2023: negative 3%
  • Quarter ended July 1, 2023: negative 1%
  • Quarter ended Sept. 30, 2023: negative 1%
  • Quarter ended Dec. 30, 2023: 2%
  • Quarter ended March 30, 2024: negative 4%

For more than a year, Apple has consistently experienced a year-over-year revenue drop -- with the lone exception being the holiday season at the end of last year.

While a challenging macroeconomic picture with lingering inflation and rising borrowing costs is playing some role in Apple's struggles, there are deeper issues at hand. Specifically, Apple's business in China -- one of its biggest markets -- is decelerating.

For the period ended March 30, Apple's revenue in China dropped 8% year over year to $16.4 billion. Much of this was attributable to a stalling iPhone segment, which dropped 10% year over year to $45.9 billion in all countries.

Considering that the iPhone is Apple's biggest source of revenue, and China is one of the company's core markets, the combination of decelerating growth in both areas doesn't exactly spell confidence for investors.

As sales continue to fall and as Apple remains silent about its ambitions in artificial intelligence (AI), it will become harder for the company to generate strong earnings power.

Look at the valuation

Right now, Apple trades at a forward price-to-earnings (P/E) multiple of 28 -- considerably higher than the S&P 500's forward P/E of 20.

Many of Apple's megacap peers have made notable strides in AI and are already seeing new waves of growth. Apple's silence on this issue is perplexing, and adds to my suspicion that the company is at a crossroads and can't seem to decide on a direction. Therefore, the stock's valuation premium isn't really warranted, in my opinion.

The company has over $160 billion of cash and marketable securities on its balance sheet. So the latest buyback plan looks like an excuse to deploy some capital to distract investors from a consistently declining revenue base and an unclear AI vision.

While Apple could surprise the market with a turnaround, I'm not overly confident that'll come anytime soon. I'd stay clear of Apple right now. The stock looks pricey, and there are better opportunities for growth investors.