The rebound extends — with a twist in leadership
The TAIEX added 1.34% to close at 44,825.78 on Wednesday, extending the recovery from last week’s violent shakeout, when a record single-day plunge on July 17 briefly knocked the index to a two-month low. The overnight lead was emphatic: the Philadelphia Semiconductor Index surged 5.21% and the S&P 500 gained 0.89% in Tuesday’s US session.
The twist is who did the lifting. TSMC — normally the engine of any Taipei rally — slipped 0.41% to NT$2,400. Instead, the second tier of the tech complex carried the index: MediaTek jumped 4.90% to NT$3,850, UMC rose 3.35% to NT$139, and Hon Hai gained 2.24% to NT$251.50. Reports that TSMC plans to raise prices by up to 10% next year across advanced and mature nodes circulated during the session; notably, the market’s read favored the beneficiaries of tight foundry supply more than TSMC itself, which spent the day digesting its rebound.
The sector indices tell the same story from another angle: the Semiconductor sub-index rose only 0.74% — dragged by TSMC’s heavy weight — while Financials & Insurance gained 0.96% and Shipping 0.64%. A 1.34% index day with every major sector index lagging the benchmark is the signature of a rally concentrated in a handful of large non-TSMC tech names.
Institutional flows: foreigners and trusts buy in tandem
| Investor type (July 22, TWSE) | Net trading value |
|---|---|
| Foreign investors | NT$+17.34B (net buy) |
| Investment trusts | NT$+16.99B (net buy) |
| Dealers (proprietary + hedge) | NT$-2.40B (net sell) |
| Three institutions combined | NT$+31.94B |
Foreign investors were plain net buyers of NT$17.34B in the cash market — a meaningful shift after the record foreign selling that accompanied the July 17 break. Just as striking, investment trusts matched them almost dollar for dollar at NT$16.99B, an unusually symmetric two-pronged bid. Dealers trimmed NT$2.40B against the move, leaving the three institutions a combined NT$31.94B net buyers on the day.
Leverage and the short channels (Tuesday’s data)
The exchange’s leverage and lending figures run a day behind, so the latest prints are from Tuesday, July 21 — before Wednesday’s session. Market-wide margin purchase balances (retail leveraged longs) rose NT$7.46B to NT$576.5B, so retail was already rebuilding leverage into the rebound. The stock-level detail is instructive: UMC margin balances jumped 7,376 lots to 220,752 — retail chasing the mature-node story — while TSMC (-725 lots) and Hon Hai (-1,175 lots) saw margin longs trimmed.
On the institutional short side, securities-lending (SBL) balances — a separate channel from retail margin shorts — rose in 553 shortable issues and fell in 332 on Tuesday. The mix was selective rather than one-way: SBL balances in UMC fell 6.21 million shares and Hon Hai 2.40 million (covering), while TSMC (+287,000 shares) and MediaTek (+262,000) saw modest institutional short builds — positions that were leaning against exactly the names that then diverged on Wednesday, in opposite directions.
Derivatives positioning (also Tuesday’s data)
TAIFEX data likewise lags a day. As of Tuesday’s session, foreign investors’ net open interest in TAIEX futures stood at -78,490 contracts, with day’s net volume essentially flat at -198 — a large standing net short that had not yet begun to unwind as of that print. The options market showed an OI-based put/call ratio of 106.32% and a volume-based ratio of 120.01%, consistent with hedges still in place after last week’s break. To be clear: this is positioning going into Wednesday, not a read on Wednesday’s action. Whether the futures short gets covered now that foreign cash-market flow has flipped positive is the single most useful confirmation signal in the queue.
Currency and the ADR gap
The Taiwan dollar softened despite the foreign cash bid, with USD/TWD up 0.32% to 32.38 at Wednesday’s close — a mild tension worth tracking, since sustained foreign equity inflows usually lean the other way. On the cross-listing, TSMC’s ADR closed at $424.61 in Tuesday’s US session, about 14.6% above Wednesday’s Taipei close on a per-share basis. The premium itself is structural — it has run roughly 15-25% in recent years given limited fungibility — and the two closes come from different sessions, so the level is not a mispricing signal. What is mildly notable is that the gap sits at the low end of its recent range; the day-to-day direction of that gap, not its existence, is what carries information.
Valuation footnote
Wednesday’s leaders are not cheap on trailing numbers: as of Tuesday’s TWSE data, MediaTek trades at 58.49x earnings and UMC at 33.79x (4.16x book) — rich by UMC’s historical standards — versus TSMC at 32.40x and Hon Hai at a comparatively modest 17.47x with a 2.91% yield. A broadening rally at these multiples raises the bar for the earnings season now underway.
What to watch
- Foreign futures positioning: Wednesday’s TAIFEX data (published with a one-day lag) — whether the -78,490-contract foreign net short in TAIEX futures starts to shrink, confirming the NT$17.34B cash-market buy.
- TSMC re-engagement: whether the index heavyweight rejoins the advance, and any follow-through on the reported up-to-10% price increases for next year.
- USD/TWD around 32.4: continued TWD softness alongside foreign equity inflows would suggest hedged rather than committed money.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.