DIOD vs VSH: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of November 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. DIOD and VSH share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined DIOD and VSH exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Diodes Incorporated has been making semiconductors since 1959 and sells into the parts of an electronic system that rarely get named on a spec sheet: protection diodes, MOSFETs, power management, logic, clock generators and timing devices, LED drivers, sensors and interface chips. Customers are automotive tier ones, industrial equipment makers, server and PC builders, consumer electronics brands and handset makers. Revenue is heavily Asian by billing geography (about 77% of Q1 2026 sales, against roughly 14% Europe and 9% North America), and the company runs a hybrid manufacturing model, fabricating roughly half its wafers internally and buying the rest from foundry partners in Korea and Taiwan. That mix of owned fabs plus outsourced capacity is what makes the earnings line swing so hard: fixed costs are real, so utilization drives gross margin, and gross margin drives everything else.

Full DIOD guide

Vishay Intertechnology designs and manufactures one of the industry's broadest portfolios of discrete semiconductors (diodes, MOSFETs, optoelectronics) and passive electronic components (resistors, capacitors, inductors). Its parts are designed into automotive, industrial, computing, telecom, military, aerospace, medical, and consumer electronics, where they are typically low-cost but essential building blocks. The business is deeply cyclical: demand rises and falls with the broader electronics inventory cycle, and Vishay competes on breadth, reliability, and long-standing customer design wins rather than on any single high-margin product.

Full VSH guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• DIOD drivers: Margin recovery from utilization and cost discipline; Automotive and industrial content growth.
• VSH drivers: Cyclical demand recovery; Vishay 3.0 capacity expansion.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: This is a cyclical business with a documented history of severe drawdowns: revenue fell roughly 35% from the 2022 peak to the 2024 trough, and the stock traded as low as about $42 within the past 52 weeks against a recent price near $85, after touching about $126 in the summer. For VSH, vishay is highly cyclical, so a stall in the electronics recovery or renewed inventory destocking could quickly reverse the order-book strength.

Pick DIOD if you believe its drivers more; VSH if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the DIOD and VSH guides.

DIOD. The valuation gap between trailing and forward multiples is the whole argument in this stock. On trailing GAAP earnings of roughly $1.87 per share the multiple looks expensive at about 46 times, but forward estimates near $5.83 per share for 2027, which assume revenue grows to about $2.27 billion, put it closer to 15 times. Trailing free cash flow of about $177 million on roughly $250 million of operating cash flow shows a business still investing through the recovery. Leverage was minimal at June 30, 2026, with about $440 million of cash and short-term investments, but the balance sheet since then reflects both the $250 million ElevATE payment and the $325 million of convertible notes.

VSH. As of October 16, 2026, trailing earnings multiples are distorted by the cyclical trough: the trailing P/E is near 147, while the forward P/E of ~16 assumes EPS climbs toward ~$1.74 in 2027. The stock trades at ~1.3 times sales and ~14.5 times EBITDA, with ~$1.3 billion of cash against ~$1.1 billion of debt. Valuation here is largely a bet on how much of the improving order book and Vishay 3.0 capacity converts into normalized margins.

Headline figures (approximate, October 2026): DIOD shows revenue (ttm) ~$1.63 billion, up ~22% year over year in the latest quarter, q2 2026 results ~$445.5 million revenue; ~$0.70 non-GAAP EPS vs ~$0.61 consensus (~$1.00 GAAP), margins (ttm) Gross ~31.7%, operating ~7.5%, net ~5.3%; Q2 gross margin 33.1%, q3 2026 guidance ~$510 million revenue (plus or minus 3%), ~$1.05 non-GAAP EPS; reports November 5; VSH shows revenue (ttm) ~$3.3 billion, q2 2026 revenue ~$889 million (up ~17% YoY), q2 2026 eps $0.19 vs $0.14 consensus, margins (ttm) ~20% gross, ~2.4% operating.

DIOD and VSH are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined DIOD and VSH exposure against your real portfolio. It is not an investment adviser.