Morning movers: Ross jumps 9.0% after a traffic-led quarter
Ross Stores rose 9.04% in delayed pre-market trading after traffic drove a strong quarter and raised outlook. OSI Systems fell 14.50% on weaker quarterly revenue, while Flowers Foods slipped 3.80% after lowering guidance.
YieldCove Desk
3 min read

The Morning Read covers the broader rebound. These delayed pre-market quotes were requested at 05:43 ET on 21 August 2026 and compared with a second scan near 05:38 ET; early trading can change quickly.
Three earnings reactions, three different messages
ROST was +9.04% at $249.68 after traffic-led sales growth and a raised outlook. OSIS was -14.50% at $186.46 as quarterly revenue contracted despite record annual metrics, while FLO was -3.80% at $6.83 after weaker volume and lower guidance.
| Ticker | Pre-market move | Delayed price | Confirmed catalyst |
|---|---|---|---|
| ROST | +9.04% | $249.68 | Q2 sales, traffic and outlook beat |
| OSIS | -14.50% | $186.46 | Fiscal Q4 results and FY2027 guide |
| FLO | -3.80% | $6.83 | Q2 volume decline and reduced outlook |
ROST: +9.04% as customer traffic drives a strong quarter
Ross Stores reported fiscal Q2 sales of $6.3 billion, up 13%, with comparable-store sales up 10% on customer traffic. Net income rose to $851 million from $508 million, and EPS reached $2.66, including about $0.60 from tariff refunds.
Delayed pre-market
$249.68
+9.04%
Prior close
$228.99
20 Aug 2026
Q2 comparable sales
+10%
Traffic-led
ROST wheel context: post-earnings liquidity still needs a live check
The delayed Cboe file showed 1,328 option series, 52,875 contracts of open interest and 60,045 contracts of prior-session volume. The earnings binary has passed, but options do not trade pre-market; the post-gap bid-ask spread and implied-volatility reset must be rebuilt after the open.
- Why it matters: Ross raised fiscal 2026 EPS guidance to $8.61-$8.77, including the $0.60 refund, and expects Q3 comparable sales of +6% to +7%.
- Objective level: the $249.68 print was $20.69 above the $228.99 close, the first support reference if the gap fades.
- Peers: TJX and BURL can distinguish an off-price read-through from a Ross-specific win.
- Main risk: investors may discount the one-time refund and focus on tougher second-half comparisons.
OSIS: -14.50% as a record year meets a weaker quarter
OSI Systems reported fiscal Q4 revenue of $484.1 million, down 4%, while GAAP EPS rose 8% to $3.27 and non-GAAP EPS rose 17% to $3.78. Fiscal-year revenue reached $1.786 billion, up 4%, and backlog was about $1.9 billion. Middle East conflicts shifted some deliveries rather than cancelling them.
Delayed pre-market
$186.46
-14.50%
Prior close
$218.09
20 Aug 2026
Fiscal Q4 revenue
$484.1M
-4% YoY
OSIS wheel context: the chain is comparatively thin
The delayed Cboe file showed 398 option series, 6,030 contracts of open interest and only 1,904 contracts of prior-session volume. A 14.5% share gap does not make that chain liquid; skip any premium comparison until live contract-level spreads are visible.
- Why it matters: the market appears to emphasize quarterly revenue and delivery timing over record annual cash flow and EPS.
- Guidance: fiscal 2027 revenue of $1.875-$1.930 billion and non-GAAP EPS of $11.13-$11.49.
- Objective level: $186.46 was $31.63 below the $218.09 close; the opening auction matters more than a thin pre-market tick.
- Main risk: deliveries could recover, or further disruption could prolong the timing problem.
FLO: -3.80% after bread volumes and guidance move lower
Flowers Foods said Q2 sales fell 4.0% to $1.193 billion as volume dropped 5.8%. Net income declined 30.3% to $40.7 million, and adjusted EPS fell to $0.21 from $0.30. Fiscal 2026 sales guidance fell to $5.070-$5.142 billion and adjusted EPS guidance to $0.75-$0.85.
Delayed pre-market
$6.83
-3.80%
Prior close
$7.10
20 Aug 2026
Q2 volume
-5.8%
Year over year
FLO wheel context: aggregate activity does not cure a narrow chain
The delayed Cboe file showed 64 option series, 24,939 contracts of open interest and 7,740 contracts of prior-session volume. The small listing set can concentrate activity, but only live bids, asks and strike-level open interest show whether a contract is usable.
- Why it matters: weaker demand, marketing, labour and freight costs pressure sales and margins.
- Objective level: $6.83 was $0.27 below the $7.10 close, near the recent low zone.
- Peers: CAG and CPB can separate packaged-food pressure from company execution.
- Main risk: cost actions and the Nature’s Own relaunch could improve the second half.
Also on the radar
- MSTR +10.33% at $124.00 near 05:43 ET: the move tracked Bitcoin; no fresh issuer filing supplied a separate catalyst.
- HL +4.13% at $21.68 near 05:32 ET: silver strength and a secondary-source analyst initiation kept Hecla active, but the exact target was not retained.
- MRNA +2.62% at $136.81 near 05:43 ET: the stock rebounded after Thursday’s 23.55% drop, but yesterday’s Phase 3 story had already been featured.
What to watch today
- 08:30 ET: Flowers Foods hosts its live results question-and-answer webcast.
- 09:30 ET — opening auction: compare regular-session prices and volume with the delayed prints, especially the thin ROST and OSIS pre-market trades.
- After 09:35 ET — option chains: rebuild bids, asks, implied volatility and strike-level liquidity before reading any premium.
- Through the close: test whether ROST holds the traffic-led gap while OSIS and FLO stabilize around their prior-close references.
Sources
- [1]Ross Stores fiscal Q2 2026 results — SEC Exhibit 99.1 — Ross Stores / SEC EDGAR · Accessed 2026-08-21 · Tier 1
- [2]OSI Systems fiscal Q4 and FY2026 results — SEC Exhibit 99.1 — OSI Systems / SEC EDGAR · Accessed 2026-08-21 · Tier 1
- [3]Flowers Foods Q2 2026 results — SEC Exhibit 99.1 — Flowers Foods / SEC EDGAR · Accessed 2026-08-21 · Tier 1
- [4]Ross Stores pre-market quote — CNBC · Accessed 2026-08-21 · Tier 2
- [5]OSI Systems pre-market quote — CNBC · Accessed 2026-08-21 · Tier 2
- [6]Flowers Foods pre-market quote — CNBC · Accessed 2026-08-21 · Tier 2
- [7]U.S. pre-market stock scan — TradingView · Accessed 2026-08-21 · Tier 3
- [8]Ross Stores delayed options quote table — Cboe · Accessed 2026-08-21 · Tier 1
- [9]OSI Systems delayed options quote table — Cboe · Accessed 2026-08-21 · Tier 1
- [10]Flowers Foods delayed options quote table — Cboe · Accessed 2026-08-21 · Tier 1
- [11]21 August 2026 Morning Read — YieldCove · Accessed 2026-08-21 · Tier 4
- [12]Ross Dress for Less storefront photograph and licence — Nicholas Eckhart / Wikimedia Commons · Accessed 2026-08-21 · Tier 4
This content is for informational and educational purposes only and is not financial advice. Options involve risk and are not suitable for every investor. Do your own research before trading.
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