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) 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
STMSTMicroelectronicsEurope52.24+1.87%+5.79%-1.95%-26.13%+67.06%+99.37%USD
ONonsemiUS74.38+0.99%+2.44%-5.04%-36.57%+30.79%+54.76%USD
IFX.DEInfineonEurope56.86+2.40%-0.39%-5.74%-24.85%+45.98%+81.46%EUR
TXNTexas InstrumentsUS258.44+1.82%-0.08%-7.17%-9.34%+33.75%+40.13%USD
MPWRMonolithic Power SystemsUS1223.86+0.84%-2.58%-9.95%-17.37%+19.85%+45.09%USD
6723.TRenesas ElectronicsJapan3302.00+0.33%-3.37%-13.40%-27.71%+21.13%+88.47%JPY
ALGMAllegro MicroSystemsUS36.61+2.95%+2.35%-13.77%-21.08%+14.66%+21.63%USD

FAQ · from the current data · as of 2026-09-04

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 2026-09-04: leading — STMicroelectronics (STM) -1.95%; onsemi (ON) -5.04%; Infineon (IFX.DE) -5.74%. Lagging — Allegro MicroSystems (ALGM) -13.77%; Renesas Electronics (6723.T) -13.40%; Monolithic Power Systems (MPWR) -9.95%. Returns are close-to-close in each name's trading currency.

Which Power Semiconductors names have done best over one year?

As of 2026-09-04: STMicroelectronics (STM) +99.37%; Renesas Electronics (6723.T) +88.47%; Infineon (IFX.DE) +81.46%. Weakest: Allegro MicroSystems (ALGM) +21.63%; Texas Instruments (TXN) +40.13%; Monolithic Power Systems (MPWR) +45.09%.

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.