The tape: a divided index print, an unambiguous rotation
A data caveat before anything else: our exchange quote feed shows the TAIEX finishing Tuesday at 43,360.66, up 0.56%, while same-day media reports put the close at 43,289, down roughly 0.22%, after an intraday dip below the 43,000 mark to a low of 42,895.81. Until the official TWSE closing index confirms one figure, treat the headline level — and its direction — as provisional. What is not in dispute is where the day’s real action was: breadth within the chip complex, with the market’s anchor stock working against it. TSMC (2330) closed at NT$2,320.00, down 2.11%, while Hon Hai (2317) lost 1.19% to NT$250.00 and MediaTek (2454) fell 1.15% to NT$3,865.00. Yet the TWSE semiconductor sub-index rose 1.37%, comfortably outrunning its own bellwether, with UMC (2303) adding 0.42% to NT$118.50. Financials & insurance gained 0.54% and shipping was flat at +0.03%. The rotation out of the mega-cap leaders and into the rest of the chip complex was the session’s defining feature, whichever headline print stands.
The currency leaned defensive: USD/TWD rose 0.37% to 32.41 at Tuesday’s close, a mild drag consistent with the foreign flow picture below. The external setup was supportive — at Friday’s U.S. close (July 31) the S&P 500 was up 0.70% at 7,489.72 with the Philadelphia Semiconductor Index roughly flat (+0.07% at 11,311.08), and S&P 500 futures traded up 1.67% at 7,644.75 during Taiwan hours.
Institutional flows: trusts did the lifting
- Foreign investors: net SELL NT$5.73B — a modest outflow, directionally matched by the softer TWD.
- Investment trusts: net BUY NT$25.27B — the day’s standout, and large enough to absorb everything the other two camps sold.
- Dealers (proprietary + hedge): net SELL NT$19.43B.
- Three institutions combined: net BUY NT$0.11B — essentially flat in aggregate, but the composition matters: domestic trusts bought the dip in size while foreign and dealer desks lightened up.
Positioning: Monday’s derivatives data, three separate leverage channels
A note on timing first: TAIFEX positioning below is Monday (August 3) data — Tuesday’s prints publish after this briefing. As of that prior session, foreign investors carried a net open interest of -90,038 contracts in TAIEX futures (net volume -6,096 on the day), a substantial net-short book on paper. The options market read as balanced: the put/call ratio stood at 97.66% on open interest and 102.71% on volume.
Taiwan’s leverage and short data run through three distinct channels, and they told three different stories as of Monday’s close:
| Channel | What it measures | Latest reading (Aug 3) |
|---|---|---|
| Margin purchases | Retail leveraged longs | NT$514.8B, up NT$7.29B on the day |
| SBL balances | Institutional short channel | Balances rose in 517 issues, fell in 357 |
| Margin shorts | Retail shorts | Mixed at the stock level (see below) |
At the single-stock level: TSMC saw retail margin longs build (+714 lots to 30,003) alongside a small SBL increase (+138,000 shares) — retail adding leverage into weakness while institutional shorts nudged higher. The clearest institutional signal was in UMC, where the SBL balance dropped by 8.23 million shares to 54.7 million — meaningful short covering in the stock that outperformed Tuesday. Hon Hai’s SBL balance also eased (-387,000 shares), while Delta Electronics saw the opposite: SBL shorts added 637,000 shares against a stock trading at 50.3x earnings and 14.0x book.
The ADR gap: narrow end of the band
TSMC’s ADR closed at $404.25 in Friday’s U.S. session, which works out to a 13.0% premium over Tuesday’s Taipei close. Two caveats keep this from being a headline: the comparison spans different sessions, and the ADR premium is structural — it has run roughly 15–25% in recent years owing to limited fungibility. What’s worth noting is that 13% sits at the narrow end of that band, mechanically a function of Taipei’s 2330 having repriced since the U.S. last traded. The signal, as always, is in how the gap moves once both markets have traded the same news — not in the level itself.
Around the market
- The TWSE will ease its “disposition stock” rules from August 10, cutting the cooling-off period from ten trading sessions to five — a liquidity-friendly tweak for volatile names.
- Brokerage account holders hit a record 14.61 million last month, with growth reportedly skewed toward investors aged 30 and under. Paired with the NT$7.29B rise in margin balances, retail engagement remains a live feature of this tape.
- Valuation reference points as of Monday’s close: TSMC trades at 31.9x earnings (10.4x book, 0.93% yield) with foreign ownership at 69.15%; MediaTek at 64.6x; UMC and Hon Hai both near 17.7–18.0x. Foreign ownership above 40% across all five names we track keeps the foreign flow line the one to watch.
What to watch
- The official TWSE closing index. The conflict between our quote feed (43,360.66, +0.56%) and media-reported figures (43,289, -0.22%) should resolve with the exchange’s official print — the breadth and flow story above holds either way, but the headline direction matters for the tape’s narrative.
- July revenue filings, due August 10. Taiwan-listed companies including TSMC must report last month’s sales within six days — the first hard fundamental checkpoint for the mega-cap names that lagged Tuesday.
- Today’s TAIFEX print. Whether foreign futures net open interest deepens from Monday’s -90,038 contracts, or covers into the cash-market dip-buying, will clarify whether the NT$5.73B cash outflow is hedging or conviction.
- Trust persistence vs. the currency. Investment trusts wrote a NT$25.27B check on Tuesday; watch whether that continues if USD/TWD extends beyond 32.41 and foreign selling persists.
Figures from TWSE, TAIFEX and exchange quote data as dated above. This briefing is informational and not investment advice.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.