Best Momentum Stocks to Buy for September 21st

Zacks highlighted Solaris Energy Infrastructure, Seadrill and Phibro Animal Health as Rank #1 momentum stocks, supported by upward current-year earnings estimate revisions of nearly 57%, 27% and 5.1%, respectively, over the past 60 days. Phibro shares gained 11.2% over the last three months versus a 2.2% increase for the S&P 500 and carry a Momentum Score of A. The item is analyst-screen commentary rather than company-reported financial news, implying limited broad market impact.

Analysis

This is a low-information momentum screen rather than a fundamental catalyst, so the principal near-term effect is likely incremental retail/quant flow into smaller, less-liquid names—not a durable repricing. SEI has the cleanest operating leverage to a sustained completion cycle: utilization and pricing of wellsite logistics equipment can lift EBITDA faster than revenue, but the same fixed-cost leverage reverses sharply if Lower-48 completion activity rolls over. The relevant confirmation is not further third-party estimate revisions, but customer capex budgets, frac-spread utilization, and 2026 E&P completion guidance.

SDRL's revisions are more meaningful only if they reflect contract rollovers at higher dayrates and backlog conversion rather than one-time accounting or timing effects. Offshore drillers remain levered to oil-company sanctioning cycles; a softer crude tape can compress the group before contracted earnings weaken. Relative beneficiaries of a real offshore upcycle include VAL and RIG, while service exposure through SLB and HAL is less balance-sheet-sensitive and offers a lower-beta way to express the theme.

PAHC's relative strength could persist for 1-3 months if estimates continue to rise, but its animal-health and nutrition exposure is more sensitive to livestock economics, channel inventory, and input costs than broad healthcare multiples. Consensus may be overvaluing the persistence of estimate momentum across all three names: upward revisions often lag price in small caps, and a promotional screen has little bearing on free-cash-flow durability. No read-through is warranted for NVDA, AMZN, or GOOG from the article's AI marketing language.

Key Decisions for Investors

• Treat SEI as a watch-to-buy, not an immediate core position: initiate only after the next earnings release confirms utilization/pricing gains and management maintains completion-market guidance; target a 3-6 month position with a 10-12% stop, as a sequential utilization decline or 2026 E&P capex cuts falsifies the thesis.
• For offshore exposure over 6-12 months, prefer a basket long VAL/RIG versus short XOP only if Brent remains above $70 and offshore contract awards accelerate; avoid a standalone SDRL momentum chase until backlog, net leverage, and contract-margin disclosure support the estimate move.
• PAHC can be a tactical 1-3 month long only on a pullback toward pre-breakout support and with evidence of improving gross margin or animal-protein demand; exit if the next report shows inventory build or guides EBITDA below consensus. Position size should remain small given liquidity and revision-driven valuation risk.
• Do not establish positions in NVDA, AMZN, or GOOG on this item. Set an alert for SEI/SDRL estimate revisions reversing by more than 5% or crude falling below $65 for several weeks; either would likely unwind the screen-driven energy momentum.