Taiwan's stock market just made history: The total market cap of Taiwan's stock market is up to $4.14 trillion, surpassing the UK's $4.09 trillion for the first time. Taiwan's market cap has TRIPLED since 2020, driven almost entirely by the AI-fueled surge in semiconductor stocks. Over this period, Taiwan Semiconductor, $TSM, which makes up more than 40% of Taiwan's total market value, has surged +680% and is trading near its all-time high. By comparison, the UK's market remains roughly in-line with its 2013 peak and pre-Financial Crisis highs. Meanwhile, foreign investors purchased +$8.9 billion of Taiwanese shares so far in April, on track for the largest monthly inflow on record. AI is reshaping the global stock market.
Statista’s infographic titled “How the AI Boom Influenced TSMC’s Bottom Line” visualizes TSMC’s market-cap and financial growth (revenues, segment contributions) tied to AI demand — directly illustrating the massive rise in TSMC’s valuation that underpins Taiwan’s broader market-cap gains driven by semiconductor/AI stock strength.
Source: Statista
Research Brief
What our analysis found
Taiwan's stock market has reached a historic milestone, with its total market capitalization climbing to approximately US$4.14 trillion in mid-April 2026, surpassing the United Kingdom's US$4.09 trillion for the first time ever. The achievement elevates Taiwan to the world's seventh-largest stock market by total capitalization, a remarkable feat for an island economy of 24 million people. The TAIEX index surged roughly 16% to 17% since the start of April alone, recording gains for eight consecutive trading sessions.
The rally has been overwhelmingly driven by Taiwan Semiconductor Manufacturing Co. (TSMC), which now commands a market capitalization of approximately US$1.9 trillion — representing roughly 45% of Taiwan's entire stock market value. TSMC reported record-breaking first-quarter 2026 results, with net profit surging 58% year-on-year to T$572.5 billion (US$18 billion) and revenue growing 35%, fueled by insatiable global demand for AI chips. Since early 2020, when TSMC's market cap stood at just US$254 billion, the company's value has grown by approximately 648%.
Foreign capital has flooded into Taiwanese equities, with international investors purchasing a net US$8.9 billion of Taiwanese shares so far in April, putting the month on track for the largest monthly inflow on record. This marks a dramatic reversal from March, when foreign investors engaged in a record net selling of US$28.7 billion. Foreign investors now hold up to 46.93% of the total market value of Taiwan's stock exchange, underscoring the market's role as a global proxy for AI hardware demand.
Fact Check
Evidence from both sides
Supporting Evidence
Taiwan surpassed the UK in market capitalization
Multiple data sources confirm that Taiwan's stock market cap of approximately US$4.14 trillion overtook the UK's US$4.09 trillion in mid-April 2026, marking the first time this has occurred in history.
TSMC accounts for more than 40% of Taiwan's market
TSMC's market capitalization of approximately US$1.9 trillion represents roughly 45% of Taiwan's total US$4.14 trillion market cap, consistent with the tweet's claim of "more than 40%."
TSMC's surge since 2020 is broadly accurate
TSMC's market cap was US$254 billion in Q1 2020 compared to US$1.9 trillion in April 2026, representing an increase of approximately 648%, which is close to the tweet's stated +680% figure.
Record foreign investor inflows in April
Foreign investors purchased a net US$8.9 billion of Taiwanese shares in April 2026, with some reports citing figures as high as US$10.3 billion, and this is confirmed to be on track for the largest monthly inflow in history.
AI demand is the primary catalyst
Analysts and financial reports consistently identify the AI-fueled surge in semiconductor demand as the dominant force behind Taiwan's market growth, with Taiwan widely viewed as a key "AI hardware proxy" by global investors.
Contradicting Evidence
Taiwan's market cap has not quite "tripled" since 2020
Taiwan's total stock market capitalization in 2020 was approximately NT$49,256 billion, or roughly US$1.64 trillion at prevailing exchange rates. Reaching US$4.14 trillion represents an increase of about 152%, which falls short of the 200% gain needed to constitute a true tripling of value.
The UK market is not merely "in-line" with its 2013 and pre-crisis highs
The FTSE 100 Index reached an all-time high of 10,934.94 points in February 2026, and the UK's market capitalization was US$4.34 trillion that same month, both well above historical peaks. This contradicts the characterization that the UK market has been stagnant since 2013.
Taiwan's lead may be fleeting
UK market capitalization was reported at US$4.34 trillion in February 2026, higher than Taiwan's April figure, and at least one source indicates London "regained the lead" after Taiwan only briefly overtook it, suggesting the milestone may prove temporary rather than a durable shift.
April figures followed extreme volatility
The record foreign inflows of April came immediately after a record net selling of US$28.7 billion by foreign investors in March 2026, suggesting the capital flows reflect short-term repositioning rather than a sustained structural trend.
Taiwan's market cap data showed significant variation in early 2026
Monthly figures ranged from US$3.23 trillion in March to US$3.68 trillion in February to US$4.14 trillion in mid-April, indicating the peak valuation that surpassed the UK was reached during a very rapid and potentially volatile rally rather than steady growth.
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