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Founded 1989 HQ New Taipei, TW Listing TWSE 3023 FY Dec Net cash ~NT$3.1bn FCFF · Dark v3

Quality compounder, fully-to-richly priced at the defensible rate — -11.5% margin of safety at the blended risk-free, cheap only at the suppressed local-bond floor

Watch — leaning mildly overvalued / sell

SINBON trades at NT$277, above the NT$261.50 sell-side target after a ~50% re-rate off the January NT$185 trough. At the defensible blended TWD risk-free (2.65%, 7.06% WACC) the DCF prints NT$245.11/sh — about 12% BELOW the market, and Monte Carlo puts ~95% probability that intrinsic sits under today's price. It looks cheap only at Taiwan's suppressed 1.13% local-bond rate (NT$321.17); at a normalized 4.30% rate the same model prints NT$185.55, ~33% below. A rate-regime bet, not a robust buy. Buy zone ~NT$210-220.

NT$150 NT$250 NT$350 p5 215 p95 277 DCF NT$245 MARKET NT$277 low rf NT$321 high rf NT$186
Sector · Electronics (cable assemblies / connectors) Mix · US 29% · CN 20% · DE 13% · TW 12% β 1.00 pin (load-bearing) Rf · 2.65% blended (65/35) (load-bearing) Governance · -5% (widely held, no controller) Quality · ROE ~20% · ROIC ~18% · net cash
Intrinsic / share
NT$245.11
base case · 2.65% blended TWD rf · 7.06% WACC · post 5% gov · pre NT$258.01 · low bookend NT$321.17 (1.13% rf) · high bookend NT$185.55 (4.30% rf)
Market / share
NT$277.00
31 May 2026 close · TWSE
Margin of safety
-11.5%
vs intrinsic
Enterprise value
NT$59.07B
73.2% terminal
Cost of equity / debt
7.34% / 2.44%
β 1.00 · CRP 0.46%
Terminal ROIC / g
11.00% / 2.00%
spread ~394bp (ROIC 11.00% vs WACC 7.06%)

What it sells, where it sells

Operating segments

2 lines FY2025
Cable assemblies / wire harnesses · ~77%
Connectors & electronic components · ~23%

Two product lines, one design-in moat. The deeper diversification is by end-market — the "MAGIC" spread (Medical, Automotive/Aviation, Green energy, Industrial, Communications) turned a -24.6% green-energy collapse into only a -6.2% total decline in FY2025.

Country mix (revenue-weighted CRP input)

United States29%
China20%
Germany13%
Taiwan12%
Netherlands7%
Japan5%
Switzerland4%
UK · SG · SE · IT10%

Weighted by end-customer demand, not production site (which is Taiwan + China). The developed-market skew — US/Germany/Netherlands — is why the country-risk premium stays low and why US solar policy can swing one MAGIC leg.

Background — five things to know before the case

Context the share price doesn't carry on its face. Skim this once and the bull / bear bullets below stop reading as inside baseball.

Where we diverge from the sector

Each row asks: if we'd used the sector median for this one assumption instead of our override, how much would the share price change? Negative = our override is more conservative (worth less); positive = more aggressive (worth more). Skim down the rightmost column to see which bets are doing the work.

Revenue CAGR (Y1–5)+7.0%below the ~10-12% consensus; off the FY25 trough base
Operating margin (Y10)11.0%top of the durable 10.5-11% band
Sales-to-capital (Y1–5)1.5heavy Tongluo/Taichung build (council correction)
Levered β (pin)1.00vs 0.41-0.47 suppressed regression / 1.65 re-levered sector
Risk-free regime · WACC2.65% → 7.06%blended 65/35; low bookend 1.13%→5.55%, high 4.30%→8.69%
Base intrinsic NT$245.11 (-11.5%) · low bookend NT$321.17 (+15.9%) · high bookend NT$185.55 (-33.0%) · market NT$277
The operating rungs are sober; the value is decided by the bottom two rungs — the β pin and the rate regime. The base headline applies the defensible blended 2.65% TWD risk-free (65% inflation-parity / 35% local-bond); the bookends apply the pure 1.13% local-bond floor and a normalized 4.30% rate.

The story & the five claims

The 10-year story this DCF is built on, plus the five anchor claims that translate the story into engine inputs.

The 10-year story

SINBON is a high-quality, net-cash, roughly 20%-ROE compounder that designs and builds cable assemblies, wire harnesses and connectors across five end-markets. We underwrite a measured recovery off the FY2025 trough, not the 2026 hype cycle: revenue compounds about 7% a year for five years — below the ~10-12% sell-side consensus — and operating margin holds the durable 10.5-11% band, lifting only modestly as higher-value AI-server, semiconductor-equipment and robotics harnesses scale. The whole call turns on one input: the TWD risk-free. We headline the defensible blended rate — 65% inflation-parity (3.49%) plus 35% local-bond-minus-spread (1.13%), i.e. 2.65%, a 7.06% WACC — because Taiwan's government-bond yield is structurally suppressed and shouldn't be imported straight into an equity hurdle. On these sober inputs the base-case DCF prints NT$245.11 a share, about 12% BELOW the NT$277 market price, and the Monte Carlo puts roughly 95% probability that intrinsic sits under today's price. The stock looks cheap only at the suppressed 1.13% local-bond floor, where the same model prints NT$321.17 (+16%); at a normalized 4.30% rate it prints NT$185.55, about 33% below the market. Essentially all of the value is a terminal perpetuity — the explicit window carries negative present value during the Tongluo/Taichung capex build — so the headline is mostly a bond-duration bet wearing an equity costume. The stock has already re-rated ~50% off the January NT$185 trough to NT$277, above the NT$261.50 sell-side target, so the cheapness that earned it a screen slot has largely been arbitraged away. At the defensible rate it is fully-to-richly priced — a WATCH leaning mildly overvalued, with a buy zone of ~NT$210-220.

Two debates worth pressure-testing

Why headline the 2.65% blended rate rather than Taiwan's 1.13% bond?
Because the risk-free belongs to the currency, not to the investor, and Taiwan's bond yield is structurally suppressed by capital controls and a savings glut. The defensible long-run TWD rate blends inflation-parity (3.49%, weighted 65%) with the local bond-minus-spread (1.13%, weighted 35%) to 2.65% — per valuations/_methodology/risk-free-rate-low-yield-currencies.md. We report all three regimes, but the 2.65% blend is the decision case; the 1.13% floor is the most flattering, not the most defensible.
Is β = 1.00 a defensible triangulation or a fudge?
It is the second load-bearing input and a hand-set judgment. The 5-year regression reads 0.41-0.47 (thin-float-suppressed for a small/mid-cap), while the Damodaran-global Electronics bucket re-levers to 1.65. We pin 1.00: above the implausibly low regression, a discount to the high-beta sector aggregate. The override moves value DOWN versus the 0.47 regression — the conservative choice, not the flattering one — but it still decides the WACC at every rate regime.
CLAIM 01Revenue
Revenue compounds ~7%/yr for five years off the FY2025 trough — above the through-cycle ~5%, but deliberately below the ~10-12% sell-side consensus and management's "exceed the NT$33bn peak in 2026" guide.
Y1–5 CAGR +7.0% → ~NT$53bn by Y10
CLAIM 02Margin
Operating margin holds the durable 10.5-11% band, reaching 11% by year 5 on a modest mix shift toward higher-value harnesses — a real ~4pt premium to the 6.3% industry median, but no operating-leverage miracle.
Y10 operating margin 11.0%
CLAIM 03Capital
Sales-to-capital held down to 1.5 in Y1-5 (a council correction from the 1.9 historical ratio) to reflect the capital-intensive Tongluo/Taichung capacity build, normalizing to 1.8 once plants are productive.
S/C 1.5 (Y1-5) → 1.8 (Y6-10)
CLAIM 04Risk
The defensible TWD risk-free is the blended 2.65% (65% inflation-parity / 35% bond-minus-spread), giving a 7.06% WACC and the NT$245.11 base intrinsic. The 1.13% local-bond floor lifts intrinsic to NT$321.17; a normalized 4.30% rate cuts it to NT$185.55. β is pinned at 1.00. This rung — rate regime plus β — is where the value is decided.
WACC 7.06% base · 5.55% low · 8.69% high
CLAIM 05Terminal
Essentially all of the base value is terminal — the dominant fact. The explicit 10-year window carries negative present value during the capex build, so the perpetuity is the valuation. Terminal ROC is faded to 11% (vs the engine's mechanical ~15.5%) so the perpetual excess return over WACC stays defensible.
Terminal ~100% of value · ROC 11%
Where we diverge from sell-side
  • We anchor on the defensible rate, not the flattering one. The 2.65% blended TWD risk-free prints NT$245.11 (-11.5%); the 1.13% local-bond floor that flatters the whole Taiwan batch prints NT$321.17, and we treat that as a bookend, not the verdict.
  • We grow slower than the Street. 7% Y1-5 vs the ~10-12% consensus, off a trough base we treat as recovery, not durable expansion.
  • We fade the terminal ROC. 11% rather than the engine's mechanical ~15.5%, refusing an indefinite perpetual excess return for a fragmented-market harness maker.
  • We flag the β pin and the rate regime as load-bearing. Most models bury both; we surface that 1.00 (not 0.47, not 1.65) and the 65/35 blend (not the bare bond) decide the WACC.
  • We read the entry as full. The street's average target (NT$261.50) sits below the market price, and our base intrinsic sits below both. The asymmetry only turns positive at a suppressed local rate.
Two-sided case — bear anchors
  • The defensible rate says overvalued. At the blended 2.65% risk-free the model gives NT$245.11, ~12% below today's price; only the suppressed 1.13% bond floor flips it positive.
  • Monte Carlo agrees. The base band runs NT$215 (p5) to NT$277 (p95) with median ~NT$245; P(intrinsic < market) is 94.8%.
  • The re-rate already happened. Up ~50% from the Jan trough to NT$277, above the NT$261.50 street target, at ~21x trailing for 7% growth.
  • Green-energy impairment, not just destocking. A quarter of revenue was hit by US solar policy; if that leg stays structurally weak the recovery underwrites slower.
  • Terminal-value dependence. Essentially all of the value is a perpetuity; small changes in g∞ or WACC swing the headline materially. The new AI-server / liquid-cooling / robot legs are 2027 vapor today.

Risks to thesis (tail, not bear case)

Rate regime
At the defensible blended 2.65% risk-free the base prints NT$245.11 (-12%); at the 1.13% local-bond floor NT$321.17 (+16%); at a normalized 4.30% rate NT$185.55 (-33%). The denominator is the whole call.
β pin (1.00)
A hand-set input between the 0.41-0.47 regression and the 1.65 sector. Conservative vs the regression but still decides the WACC at every regime.
Full entry price
~21x trailing, ~50% re-rated, above the NT$261.50 street target and above our base intrinsic. Monte Carlo puts ~95% odds intrinsic is below price. Buy zone is ~NT$210-220, not here.
Green-energy leg
~25% of revenue, hit -24.6% by US solar policy and destocking; structural impairment would slow the modeled recovery.
Terminal-value weight
Essentially all of the base DCF is terminal; sensitive to g∞, the faded ROC and WACC.
Governance frictions
3/11 independent board and a reinvestment-subsidiary lattice; second-order, covered by the -5% haircut.

10-year forecast

Bars are revenue and FCFF; the line is operating margin. The explicit window is a measured ~7% recovery off the FY2025 trough, below consensus — and carries negative present value during the Tongluo/Taichung capex build, leaving essentially all value in the terminal perpetuity.

Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 0 52.9B rev (TWD) 0% 15% op margin revenue FCFF op margin

Monte Carlo distribution

Monte Carlo (base, 2.65% blended rf) spans NT$215 (p5) to NT$277 (p95), median ~NT$245 — at or below the NT$277 price across nearly the whole distribution. P(intrinsic < market) is 94.8%: the simulation, not just the point estimate, reads the stock as fully-to-richly priced at the defensible rate.

p5 p25 p50 p75 p95 market 277.00 194.2 244.9 301.5 freq equity / share (TWD)

Mean NT$246.05 ± NT$18.50/sh, 1000 iterations (0 failed). P(intrinsic < market NT$277.00) = 94.8%.

Cost of capital build
Risk-free rate 2.65%
Mature-market ERP 4.23%
Levered β 1.00
Weighted CRP 0.46%
Cost of equity 7.34%
Pre-tax cost of debt (synth Aaa/AAA) 3.05%
D / V ~6%
WACC 7.06%
Full year-by-year DCF
Year Revenue Op mgn EBIT EBIT(1−t) Reinvest FCFF PV
1 NT$33.20B 10.60% NT$3.52B NT$2.75B NT$1.45B NT$1.30B NT$1.22B
2 NT$35.52B 10.70% NT$3.80B NT$2.97B NT$1.55B NT$1.42B NT$1.24B
3 NT$38.01B 10.80% NT$4.10B NT$3.21B NT$1.66B NT$1.55B NT$1.26B
4 NT$40.67B 10.90% NT$4.43B NT$3.46B NT$1.77B NT$1.69B NT$1.29B
5 NT$43.51B 11.00% NT$4.79B NT$3.74B NT$1.90B NT$1.84B NT$1.31B
6 NT$46.12B 11.00% NT$5.07B NT$3.98B NT$1.45B NT$2.53B NT$1.68B
7 NT$48.43B 11.00% NT$5.33B NT$4.20B NT$1.28B NT$2.92B NT$1.82B
8 NT$50.37B 11.00% NT$5.54B NT$4.39B NT$1.08B NT$3.31B NT$1.93B
9 NT$51.88B 11.00% NT$5.71B NT$4.54B NT$839M NT$3.70B NT$2.02B
10 NT$52.92B 11.00% NT$5.82B NT$4.66B NT$576M NT$4.08B NT$2.09B
Methodology & flags

Damodaran FCFF DCF, 10y explicit + perpetuity, in TWD. Risk-free 2.65% (local-currency government bond). Synthetic credit Aaa/AAA. CRP 0.46% from revenue-weighted country mix × Damodaran 2026 CRPs. Terminal ROIC faded to 11.00%; 5% governance haircut applied post-DCF. Monte Carlo: 1000 iterations. Engine v1.0.0 · result: /Users/valentin/Documents/notes_jiliac_labs/Finance/Damodaran/valuations/sinbon/output/2026-06-01-result.json

  • R&D cap: OFF · Lease cap: OFF · Failure: OFF · ESO: OFF
  • Governance haircut: 5% applied post-DCF (NT$258.01 > NT$245.11)
  • Sensitivity tornado: not run