To reach the $4 trillion club, both of these companies must have some major business growth ahead, which they do. Both are major beneficiaries of AI spending, and with AI spending projected to continue rising over the next few years, these two are in great shape. <\/p>\n TSMC is probably the easiest winner to pick in this sector, as its logic chip fabrication processes are utilized by nearly every company in the AI computing industry, including Broadcom. TSMC will benefit as long as there is increased chip demand, which has proven true so far. During TSMC’s latest earnings call, CEO C.C. Wei noted that chip demand looks strong through at least 2029 to 2030, leaving multiple years of incredible growth ahead. <\/p>\n Additionally, management announced another $100 billion investment in its Arizona facilities, showcasing that there is still more production capacity necessary to meet demand. <\/p>\n Broadcom is also feeling huge demand increases, and its custom AI chip business is about to take off. Instead of offering a broad-purpose computing unit like a GPU, Broadcom is partnering with AI hyperscalers, including Alphabet, to design and produce custom AI chips. These purpose-built chips can outperform GPUs in certain applications, and make it an easy way to stretch capital expenditure dollars further by obtaining more compute at a lower cost. <\/p>\n Broadcom CEO Hock Tan has told investors that its AI semiconductor business will generate more than $100 billion during 2027, a major increase from today’s levels<\/a>. <\/p>\n But will that be enough to get Broadcom into the $4 trillion market-cap club? <\/p>\n These two have a ways to go to get there <\/p>\n Story Continues <\/p>\n TSMC is a $2.2 trillion business, and Broadcom is a $2 trillion company, so both have work to do to reach a $4 trillion valuation. But I think it’s possible. For a long-term price-to-earnings ratio, I think 30 is probably reasonable, considering their above-average growth, strong execution, and market position. That’s exactly where TSMC trades at now, so this also jibes with current market conditions. <\/p>\n Wall Street analysts project $24.46 in earnings per share (EPS) for TSMC in 2028. At a P\/E ratio of 30, that prices the stock at $733 per share, indicating 71% upside from today’s levels. It would also price TSMC stock at a market cap of $3.74 trillion, just short of the $4 trillion target. However, Wall Street analysts have consistently underprojected TSMC’s growth rate, and that wouldn’t surprise me here. As a result, I think TSMC can get across that threshold<\/a> with a bit of outperformance, which it’s well accustomed to delivering. <\/p>\n Broadcom is in a similar boat, and Wall Street expects $21.28 for 2028 earnings. At a P\/E of 30, that prices the stock at $638, up 52% from today’s levels. However, I think Wall Street is way underestimating the impact of having several AI hyperscalers adopt Broadcom’s custom AI infrastructure, which could lead to several years of strong growth. Furthermore, there are only two long-term estimates for 2028, so some bearish analysts could be driving this sentiment. <\/p>\n The growth is there for both of these two companies to capture, and I think it will get them both across the $4 trillion threshold by 2028, although it will be a close call. By 2029, each of them should be across the $4 trillion mark, which is still a strong performance in just a handful of years. <\/p>\n Should you buy stock in Taiwan Semiconductor Manufacturing right now? <\/p>\n Before you buy stock in Taiwan Semiconductor Manufacturing, consider this: <\/p>\n The Motley Fool Stock Advisor analyst team just identified what they believe are the\u00a010 best stocks<\/a> for investors to buy now\u2026 and Taiwan Semiconductor Manufacturing wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years. <\/p>\n Consider when Netflix made this list on December 17, 2004… if you invested $1,000 at the time of our recommendation,\u00a0you’d have $400,209!* Or when Nvidia made this list on April 15, 2005… if you invested $1,000 at the time of our recommendation, you’d have $1,375,393!* <\/p>\n Now, it’s worth noting\u00a0Stock Advisor’s total average return is 964% \u2014 a market-crushing outperformance compared to 215% for the S&P 500.\u00a0Don’t miss the latest top 10 list, available with\u00a0Stock Advisor, and join an investing community built by individual investors for individual investors. <\/p>\n See the 10 stocks \u00bb<\/a> <\/p>\n *Stock Advisor returns as of August 14, 2026. <\/p>\n Keithen Drury<\/a> has positions in Alphabet, Broadcom, and Taiwan Semiconductor Manufacturing. The Motley Fool has positions in and recommends Alphabet, Broadcom, and Taiwan Semiconductor Manufacturing. The Motley Fool has a disclosure policy<\/a>. <\/p>\n<\/a> Image source: Getty Images. TSMC and Broadcom have a massive growth catalyst in front of them <\/p>\n