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Rubin Build-Out 100 · Sector S11 · Layer 4 · Infrastructure

Power Semiconductors

Power-management IC, GaN, SiC. Every megawatt the AI build-out adds requires the right power semis underneath.

Equal-weight — 1d —
Cap-weighted — 1d —
Momentum (drift) — 1d —
Constituents — in this sector

Composite Index — since inception (Dec 30, 2025)

Three weighting variants of the same constituent basket, rebased to 1,000 at inception. EW = ticker-equal-weight with quarterly drift. CW = cap-weighted (10% cap; below ten names the cap is infeasible, so the sub-index is equal weight by construction) with semi-annual rebalance. MW = drift-only (1/N at inception, market does the tilting between rebalances). Click a legend entry to toggle its line.

Constituents

Every Rubin constituent tagged into this sector. Click a row to open the stock detail page with full chart + Money-Temperature scoring.

Ticker Company Region Last 1d 1w 1m 3m 6m 1y CCY
STMSTMicroelectronicsEurope51.58-1.68%+6.11%+4.29%-31.12%+54.34%+81.10%USD
TXNTexas InstrumentsUS270.65-0.72%+4.85%+4.08%-13.20%+37.55%+50.98%USD
MPWRMonolithic Power SystemsUS1335.55-1.47%+14.19%+2.41%-7.14%+19.63%+46.88%USD
IFX.DEInfineonEurope56.26-3.94%+3.42%+1.94%-28.09%+50.31%+70.17%EUR
6723.TRenesas ElectronicsJapan3490.00+5.47%+9.89%+1.66%-30.77%+35.11%+105.05%JPY
ONonsemiUS73.15-1.28%+7.10%+0.88%-38.39%+15.93%+45.08%USD
ALGMAllegro MicroSystemsUS35.13+0.06%+6.10%-6.17%-41.61%+7.66%+11.84%USD

FAQ · from the current data · as of 2026-09-24

Power Semiconductors — data Q&A

What is the Power Semiconductors sub-index of the Rubin Build-Out 100?

7 constituents, listed across Europe, US, Japan, computed equal-weight, cap-weight and momentum-weight from the same basket and rebased to 1,000 at the index base date. Part of the Rubin Build-Out 100 — /indices/rubin/.

Which Power Semiconductors constituents lead and lag over one month?

As of 2026-09-24: leading — STMicroelectronics (STM) +4.29%; Texas Instruments (TXN) +4.08%; Monolithic Power Systems (MPWR) +2.41%. Lagging — Allegro MicroSystems (ALGM) -6.17%; onsemi (ON) +0.88%; Renesas Electronics (6723.T) +1.66%. Returns are close-to-close in each name's trading currency.

Which Power Semiconductors names have done best over one year?

As of 2026-09-24: Renesas Electronics (6723.T) +105.05%; STMicroelectronics (STM) +81.10%; Infineon (IFX.DE) +70.17%. Weakest: Allegro MicroSystems (ALGM) +11.84%; onsemi (ON) +45.08%; Monolithic Power Systems (MPWR) +46.88%.

How often does this sub-index update, and is it advice?

The worker recomputes the sub-index and every constituent's returns after each US close (prices converted to USD for the index level; per-name returns stay in local currency). This page is a data surface in an investment research diary — it describes constituents and returns, it recommends nothing.