Quantum Computing Stocks IonQ and D-Wave Quantum Have Nearly Doubled in 5 Weeks -- Don't Take the Bait

IonQ and D-Wave Quantum have surged 98% and 84%, respectively, since March 30, driven by investor enthusiasm for quantum computing rather than broad fundamental proof. IonQ reported Q1 revenue of $64.7 million, up 755% year over year, and raised full-year sales guidance to $260 million-$270 million, while D-Wave ended 2025 with $884.5 million in cash and marketable investments ahead of its May 12 report. The article’s core message is cautionary: both stocks trade at extreme trailing P/S ratios of 116x and 311x, and the author argues expectations are likely too high.

Analysis

The market is pricing quantum as if the sector has already crossed from R&D into commercialization, but the real second-order effect is capital efficiency, not product adoption. With the incumbents still years ahead in balance-sheet strength and compute distribution, the better read-through is that public pure-plays are becoming acquisition currency and financing vehicles rather than durable standalone winners. That tends to pull private-market valuations up too, which can invite more competition from hyperscalers and defense-adjacent players that can subsidize quantum efforts with core cash flows.

The main risk is not a near-term revenue miss; it is multiple compression from a narrative reset. These names are trading like platform software despite economics that still look closer to pre-scale hardware, so any cadence slowdown, dilution event, or guidance normalization can re-rate them quickly over days to weeks. A second-order headwind is that rising cash hoards may be interpreted as strength, but they also buy time for rivals to close the technology gap and for customer procurement cycles to stay patient.

Consensus is missing how much of the upside is already embedded in the current tape. The strongest counterpoint is that the sector could remain strategically important while still being a bad equity trade: long-duration optionality often destroys early public shareholders because the eventual winners are not the first to list. If quantum becomes a real platform over the next 2-5 years, the best risk-adjusted expression may be through diversified enablers with existing earnings power rather than the highest-beta pure plays.

Key Decisions for Investors

• Short a basket of IONQ/QBTS/RGTIW on strength; use a 1-3 week horizon and size modestly, because the setup is vulnerable to mean reversion if the market shifts from story to execution.
• Pair trade: long NVDA or INTC versus short IONQ/QBTS over 3-6 months; the incumbent balance sheets can fund quantum R&D without equity dilution, while pure-plays remain hostage to capital markets.
• If expressed via options, buy IONQ put spreads 1-2 months out after any post-earnings rally; the payoff is asymmetric if guidance or margin assumptions normalize.
• Avoid chasing QBTS into the next print; prefer waiting for the first post-results gap-up fade before initiating shorts, since event-driven momentum may persist into the catalyst.