Taiwan Semiconductor (TSMC) (TSM 1.50%) will release earnings for the third quarter of 2025 on Oct. 16. The company produces the majority of the world’s most advanced semiconductors. Since many of the advancements in artificial intelligence (AI) are not possible without its manufacturing capabilities, the stock is likely to remain a market beater over the long term.

Nonetheless, TSMC stock is at an all-time high, and anticipated growth is often not enough of a reason to buy a stock. With an earnings report looming, should investors buy shares of the stock now or stay on the sidelines and hold out for a lower price?

The bull case in TSMC stock

As previously mentioned, TSMC faces a few threats to its long-term bull case. It is the world’s largest semiconductor foundry company, and as of the second quarter of 2025, its market share now exceeds 70%, according to TrendForce. This is up from 67% in the previous quarter.

Additionally, Grand View Research forecasts a compound annual growth rate (CAGR) for AI of 32% through 2033. These combined factors make it highly likely that TSMC’s rapid growth will continue.

For now, it has exceeded that growth rate, and that rapid growth is on track to continue. In the first half of 2025, revenue increased by 40% to $56 billion compared to the same period the previous year. It also stated on its Q2 earnings call that it expects between $31.8 billion and $33 billion in revenue during Q3, representing a 38% rise at the midpoint.

Investors should note that the company beat revenue estimates in each of the previous four reports. Thus, if it beats estimates like it has in previous quarters, the 40% revenue growth rate from the first two quarters of the year could continue into Q3.

Moreover, investors should watch for sales of the most advanced chips, namely those in the 2nm – 5nm size range that power the most advanced AI functions. This is the area where TSMC stands out above competing foundries, since Samsung is the only other chip producer that can manufacture these smaller chips.

Areas of danger

Additionally, even if it is likely to beat earnings estimates, TSMC faces significant challenges.

One is simply keeping up with demand. It allocated almost $20 billion to capital expenditures (CapEx) in the first half of the year, and much of that will go to foundries in Arizona, where it plans to allocate $165 billion to building six advanced manufacturing facilities. Even though that is a considerable sum, it will likely have to maintain or increase that spending to match demand.

Another factor is that the majority of production takes place in Taiwan, which faces considerable geopolitical tensions because of its proximity to China. Investors differ on the danger level, as China can probably not afford to have the supply of chips disrupted by geopolitical events.

Still, investors should also remember that Warren Buffett forced Berkshire Hathaway to sell its TSMC stake for this reason. Hence, investors must remain aware of this concern.

That issue may also be the reason for TSMC’s relatively low valuation. It has traded at an average P/E ratio of 25 over the last five years, far below its key clients such as Apple and Nvidia.

Also, while its current 33 P/E ratio is low for a company with 40% revenue growth, the earnings multiple has rarely exceeded 40 in recent years. That could increase the danger of paying a relative premium for TSMC.

Should investors buy TSMC stock before earnings?

Under current conditions, no obvious factor is pushing investors to either delay or accelerate purchase decisions before the earnings report.

Indeed, nobody knows how TSMC stock will react once the company releases Q3 earnings. Still, some risk-averse investors may feel apprehensive about the report amid the rising P/E ratio.

If that is the case, one strategy is to do both, allocate half of one’s funds to this stock now and wait for the report to spend the additional half. Shareholders who dollar-cost-average into this stock are likely already employing this strategy, and with this near-term outcome unknown, that approach could also work for other investors.

Ultimately, barring the aforementioned geopolitical risks, TSMC stock should remain on a bull trend as it struggles to meet the demand for AI chips. For this reason, time in TSMC is almost certainly more critical to winning with the stock than the timing of one’s purchase decisions.