I'll compare TSMC's Taiwan listing (2330) against its ADR (TSM) to see if there's an ADR premium.Only the ADR (TSM) returned data — the Taiwan ticker 2330 isn't resolving to a price series. Let me verify the correct local ticker.The Taiwan-listed share (2330.TW) isn't in my local data — I only have the ADR (TSM). Let me pull the latest Taiwan price versus the ADR to compute the premium using live data.Let me get the current ADR price and the Taiwan-listed price to compute the live premium.I have the data I need. Here's the comparison.

TSMC: ADR vs Taiwan-Listed Shares

Setup: TSMC's ADR (NYSE: TSM) trades with a 5:1 ratio — one ADR equals 5 Taiwan ordinary shares (TWSE: 2330).

Latest prices (as of Aug 13–14, 2026): - ADR (TSM): US$430.49 (Aug 13 close) - Taiwan (2330): NT$2,420 (Aug 14 intraday) - USD/TWD: ~29.0 (approx.)

The math: - One ADR = 5 shares → implied ADR value = 5 × NT$2,420 = NT$12,100 - ADR in TWD terms = US$430.49 × ~29.0 ≈ NT$12,484 - Implied ADR premium ≈ +3%

Answer: There's a premium, but it's small right now

The TSMC ADR is not priced the same as the Taiwan shares — it trades at a premium of roughly 3% currently, having narrowed sharply from earlier levels.

Context on where the premium has been: - Dec 2025: ~26% premium - Apr 2026: ~17% (a one-year low at the time) - Jul 2026: ~14% (spiked on Taiwan's Friday selloff) - Now: ~3% (near parity)

The ADR has historically carried a structural premium averaging ~22% over the Taiwan shares — driven by foreign buyers who can't or won't trade directly on the TWSE, higher AI-demand-driven US fund flows, and geopolitical-sensitive positioning. That premium compressed dramatically through 2026 as foreign institutions derisked more aggressively than local investors.

Why there's a premium at all: the two are economically identical (same company, same dividends/earnings per share via the 5:1 ratio), so any difference reflects access — US investors pay a convenience premium to own TSMC on the NYSE without FX, custody, and TWSE access friction. When foreign sentiment sours (as it did in 2026), that premium collapses toward parity, which is exactly what UBS flagged as a trading opportunity at the 10–17% range.

Note on timing caveat: the implied premium is only approximate because the two markets don't trade simultaneously — Taiwan closes ~before US opens, so the intraday Taiwan price vs. the prior-day ADR close introduces a small timing gap.

Here's the updated picture on the TSMC ADR vs. Taiwan-listed premium, from the latest reporting.

TSMC ADR Premium: Narrowing to a Two-Year Low

Setup recap: 1 ADR (NYSE: TSM) = 5 Taiwan ordinary shares (TWSE: 2330), so the two are economically identical — any gap is a pure access/liquidity premium.

The premium trend (Bloomberg-compiled figures): - Dec 2025: ~26% - Apr 2026: ~17% (one-year low at the time) - May 2026: ~13.7% average — a two-year low, and the fifth straight monthly decline - Jul 2026: ~14.4% (briefly spiked on Taiwan's Friday selloff)

Why it's compressed: Taiwan-listed shares have surged >50% YTD, outpacing the ADRs' <40% gain. Several forces drove this: - New regulatory changes letting local equity funds hold more domestic stocks - A retail frenzy into AI-related names locally - Local investors showing far less "AI bubble" anxiety than US institutions - Foreign institutions, by contrast, derisked on macro/geopolitical concerns (oil, Iran war)

The big picture: For years the ADR traded at a structural premium (historical average ~22%) because US investors paid up for NYSE access, index inclusion, and a fungible instrument — while the Taiwan ordinary shares require special regulatory approval to convert. The rapid erosion suggests local investors are now the marginal price-setters in TSMC's valuation, a reversal of the years when foreign demand dominated.

What to watch: UBS flagged the compression as a relative-value setup — buying ADRs/shorting Taipei when the premium nears 10%, reversing toward 30%. A sustained widening would signal returning local caution; further compression would suggest domestic conviction in the AI capex cycle still has room to run.

Note: any "live" premium figure carries a small timing gap, since Taiwan closes well before the US opens.