The day’s story: resilience where a rout was priced
Monday’s setup looked ugly. The Philadelphia Semiconductor Index had fallen 4.25% at Friday’s US close (July 24), the kind of overnight lead that usually costs Taipei a full percentage point or more. Instead, the TAIEX finished at 43,634.19, down a mere 0.05%. Two things did the work: S&P 500 futures recovered strongly during Asian hours, up 0.86% by Taipei’s close after a flat 7,411.98 cash finish on Friday, and foreign investors showed up on the buy side of the cash market. A 1.45% rally in the Financials & Insurance sector index absorbed most of what tech gave back.
Within semiconductors the damage was selective rather than systemic. TSMC (2330) closed exactly unchanged at NT$2,350 — a notable feat given the SOX lead — while the pain concentrated in MediaTek (2454), down 1.87% to NT$3,680, and UMC (2303), down 1.56% to NT$126. The TWSE Semiconductor sub-index eked out +0.01%, telling you the heavyweight held the line while second-tier names bled. Hon Hai (2317) added 0.20% to NT$253, and Shipping gained 0.61%.
Institutional flows: foreigners buy, dealers sell
Monday’s official TWSE net trading values:
| Investor class | Net (NT$) | Direction |
|---|---|---|
| Foreign investors | +8.04B | Net buy |
| Investment trusts | -0.28B | Small net sell |
| Dealers (prop + hedge) | -7.86B | Net sell |
| Three institutions combined | -0.10B | Roughly flat |
The pattern is clean: foreign money bought the semiconductor scare, dealers took the other side almost dollar-for-dollar, and domestic trusts sat out. Foreign cash-market buying into a weak tech tape is the single most constructive data point of the session, and it squares with where the buying landed — financials, where foreigners’ bid was visible in the sector’s outperformance.
Derivatives positioning — previous session’s picture
TAIFEX data for Monday is not yet published, so the latest positioning read is Friday, July 24. As of that session, foreign investors carried a net short of 76,260 contracts in TAIEX futures (TX) open interest, having sold a modest 1,044 contracts net on the day. The options market’s put/call ratio stood at 112.70% on open interest and 97.10% on volume. That is a hedged, mildly defensive book coming into the week — context for Monday’s action, not a driver of it. Whether foreigners trimmed that futures short into Monday’s cash buying is the question tomorrow’s TAIFEX release answers.
Leverage and shorts: three channels, all pointing the same way
Taiwan’s leverage data (also last published for Friday, July 24) splits into three distinct channels, and it is worth keeping them separate. Retail leveraged longs — the market-wide margin purchase balance — fell NT$5.57B to NT$577.1B, so retail was de-risking rather than buying the dip on credit. UMC saw the largest single-name unwind among the majors, with margin balance down 12,938 lots, alongside smaller reductions in Hon Hai (-737) and TSMC (-17); MediaTek was the exception with a marginal +39 build.
In the institutional short channel — SBL borrowed balances — shorts rose in 517 shortable issues versus 348 declines market-wide, a breadth reading that leans bearish. But the large-cap detail cuts the other way: SBL balances fell in UMC (-17.5M shares), Hon Hai (-9.7M), TSMC (-0.1M) and MediaTek (-0.5M). Institutional shorts were covering the index heavyweights even as they spread out across the broader list. Only Delta Electronics saw a modest SBL build (+224K shares). Meanwhile retail margin shorts ticked up in UMC (+507 lots) — a separate, smaller channel from the SBL borrow.
Taken together with Monday’s foreign cash buying, the positioning scoreboard reads as stress that is concentrated in breadth and in derivatives hedges, not in the mega-caps that set the index.
Currency and the ADR gap
USD/TWD closed at 32.31, up just 0.02% — no currency stress accompanying the tech wobble, and consistent with foreign money flowing in rather than out.
On the TSMC ADR: TSM closed at $403.41 in New York on Friday, which works out to a 10.9% premium over Monday’s Taipei close. Two caveats before reading anything into that. The premium is structural — it has run roughly 15–25% in recent years owing to limited fungibility — and the two closes are from different sessions. The level itself is not a mispricing signal; what is worth noting is that the gap currently sits below its habitual range, largely because Friday’s US semiconductor selloff hit the ADR while Taipei had not yet traded through Monday. If Taipei stays firm and the ADR recovers with tonight’s futures bounce, expect the gap to re-widen toward its norm.
Valuation snapshot (as of July 24, TWSE)
- TSMC: PER 31.59, PBR 10.34, yield 0.94% — foreign ownership 69.28%
- MediaTek: PER 59.76, PBR 15.34, yield 1.43% — foreign ownership 55.54%
- UMC: PER 32.16, PBR 3.96, yield 2.04% — foreign ownership 41.16%
- Hon Hai: PER 17.93, PBR 1.99, yield 2.84% — foreign ownership 40.27%
What to watch
- Tuesday’s TAIFEX release: did foreign investors reduce the -76,260-contract TX net short to match their NT$8.04B cash-market buying, or is Monday’s buying hedged?
- SOX response to the futures bounce: S&P futures were up 0.86% at Taipei’s close; whether US semis reclaim part of Friday’s 4.25% drop decides if MediaTek and UMC stabilize.
- SBL breadth: institutional shorts rose in 517 issues while covering the heavyweights — watch whether that broad short base builds further or follows the large-caps into covering.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.