Taipei, Monday, August 17 — The TAIEX made its run at 46,000 and could not hold it. The benchmark rallied as much as 332.63 points early in the session to an intraday high of 46,189 before high-level profit-taking pulled it back into a consolidation range, closing up 46.26 points (+0.10%) at 45,857.27. Turnover was heavy at NT$942.0 billion. The modest headline change conceals a sharply two-speed tape: foreign money kept pouring into the cash market, shipping ripped higher, and IC design — led by a 3.8% drop in MediaTek — did most of the damage on the downside.
Institutional flows: foreigners extend the streak, trusts step aside
| Investor category | Net trading value (Aug 17) | Direction |
|---|---|---|
| Foreign investors | NT$+45.45B | Net buy — sixth consecutive session |
| Investment trusts | NT$-17.75B | Net sell — snapping a 5-day buying streak |
| Dealers (prop + hedge) | NT$+1.41B | Net buy |
| Combined | NT$+29.11B | Net buy |
The foreign bid showed up in the currency as well. USD/TWD opened at 32.02 and finished at 31.77, a 1.09% appreciation in the Taiwan dollar on the day — the kind of move that typically accompanies sustained equity inflows rather than a one-off rotation. The domestic trusts selling NT$17.75B into that inflow is the counterweight worth noting: local institutions took profit at the highs that foreigners were paying up for.
Semiconductors: TSMC steady, IC design heavy
The Semiconductor sub-index closed essentially flat at +0.05%, but the internals diverged. TSMC (2330) added NT$5 (+0.21%) to NT$2,400 after touching NT$2,410 early, and wafer-carrier supplier Gudeng Precision (3680) gained on record first-half profits. Against that, MediaTek (2454) fell NT$160 (-3.80%) to NT$4,050, and weakness across IC design and packaging/testing capped the group. Foundry peer UMC (2303) firmed 0.41% to NT$121.50, and Hon Hai (2317) slipped 1.73% to NT$255.
The valuation gap frames the divergence: at Friday’s TWSE data, MediaTek trades at 69.5x earnings versus TSMC’s 27.8x, leaving the design house more exposed when the tape turns selective. The overnight US backdrop offered no push either way — the Philadelphia Semiconductor Index eased 0.31% on Friday and the S&P 500 slipped 0.17% on softer retail sales, though S&P futures were up 0.20% during Asian hours. TSMC’s ADR closed at $426.35 in Friday’s US session, roughly 12.9% above Monday’s Taipei close — a gap that is structural (ADRs have habitually carried a 15–25% premium in recent years) and drawn from different sessions, so the level itself signals nothing; if anything, the strong TWD complicates the comparison, and only day-to-day changes in the gap are worth tracking.
Beyond tech: shipping runs, financials firm
- Shipping +4.00% — the day’s standout sector. Wan Hai surged to the daily limit-up, with solid gains in Yang Ming and Evergreen Marine; Evergreen completed its dividend recovery.
- Financials & Insurance +1.28% — a steady bid consistent with the foreign inflow.
- AI hardware split — King Slide (2059) hit the 10% limit-up at NT$13,750 and Largan (3008) locked limit-up at NT$5,070, while Gigabyte (2376) fell hard to NT$358, near limit-down. Quanta (2382) added NT$6 to NT$333.5.
Positioning: cautious derivatives, calm retail — as of Friday
Derivatives and leverage data run a session behind, so the following reflects Friday, August 14, not today’s action. Foreign investors carried a net short of 85,179 contracts in TAIEX futures open interest, and the options put/call ratio stood at 115.0% on open interest (103.2% by volume) — a defensive derivatives stance sitting against six straight days of foreign cash buying. With final settlement this Wednesday, how that futures short rolls or unwinds is the live question.
Taiwan’s three leverage channels, kept separate as always:
- Retail margin longs: the market-wide margin loan balance fell NT$2.72B to NT$547.1B on Friday — retail leverage edged down rather than chasing the highs. TSMC margin balance ticked up 97 lots; UMC, Hon Hai, Delta and MediaTek all saw modest reductions.
- Institutional shorts (SBL): balances rose in 533 shortable issues and fell in 322 on Friday. MediaTek’s SBL balance rose 383,000 shares and TSMC’s rose 246,000 — institutions were leaning into the chip names ahead of Monday’s session — while Hon Hai saw 1,056,000 shares covered.
- Retail shorts remained small and quiet across the majors (TSMC’s margin short balance: 36 lots).
The overall picture from the positioning scoreboard: strong foreign cash buying against a stale-but-large foreign futures short and an elevated put/call ratio — hedged participation rather than full-throated conviction.
What to watch
- Wednesday’s TAIFEX settlement (Aug 19) — whether the foreign futures net short of 85,179 contracts (as of Friday) is rolled forward or unwound into and after final settlement.
- The foreign buying streak vs. the 46,000 level — six sessions of net purchases and a strengthening TWD (31.77) have carried the index to the milestone twice intraday; watch whether trusts keep selling into it.
- Nvidia earnings and the US chip tape — with the Philadelphia Semiconductor Index soft on Friday and Taiwan’s IC design names already wobbling, the next US session sets the tone for MediaTek and the AI hardware complex.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.