After the Open · Market Scan · mangostracker.ai

This morning's setups

Monday, September 28, 2026 — a read of the tape about 15 minutes after the opening bell.

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MDB craters on surprise CEO exit; NVDA extends buyback-fueled climb — A mostly orderly morning with two standout single-name shocks (MDB, ARM) against a backdrop of a rate-driven software pullback and continued AI-buyback enthusiasm in NVDA.

Candidates worth a look

5 names flagged from the watchlist.

IDEA MDB
Price
$317.51
That day
-22.6%

Gapping down over 22% after President/CEO CJ Desai abruptly resigned to join Meta, leaving no permanent CEO the day before MongoDB's scheduled Investor Day -- a name to watch for a bounce if interim leadership steadies the narrative tomorrow, not one to chase down today.

IDEA ARM
Price
$285.22
That day
-8.1%

Extending its recent slide (down ~8% on top of an already-weak week) amid lingering overhang from the CFO's disclosed share sale and SoftBank's enlarged $25B margin loan against ARM shares, on a stock still priced north of 300x trailing earnings.

IDEA BE
Price
$267.77
That day
-7.2%

Already a portfolio holding, down over 7% intraday -- fresh legs on the Oracle Project Jupiter data-center financing jitters that first hit the stock last Thursday, despite BE's recent S&P 500 inclusion tailwind.

IDEA CRM
Price
$222.82
That day
-4.8%

Held position down nearly 5%, continuing its post-Investor-Day slide as part of a broader rate-driven software selloff -- fundamentals (raised multi-year guidance) haven't been the issue, sentiment/rates have.

IDEA NVDA
Price
$232.42
That day
+3.3%

Held position up over 3%, extending gains on the just-announced $150B buyback authorization (largest single increase in history) plus Huang's ~70% revenue growth target through FY28 -- momentum, not a new entry point.

What this is (and isn't)

A second, independent lens on the same watchlist.

Every weekday morning, about 15 minutes after the market opens, a separate job re-reads the same maintained watchlist used by the overnight trading bot — but this time against live intraday action instead of yesterday's close. It's looking for setups that only become visible once the market is actually trading: a gap that's holding, a name reversing off the open, a sector moving together.

Timing

9:30 AM ET
The market opens. The overnight trading decisions (see the Morning Note) were already booked hours earlier at yesterday's close.
~9:45 AM ET
This job fires, pulls live intraday quotes for the full watchlist, and this page updates with whatever it found — or didn't.
~1:00 PM ET
A third job takes an afternoon-session read — index structure, breadth, sector leadership — on the Midday Report page.

Archive

Past mornings' scans.

Notes

This page is market commentary generated against real intraday data, not a trade signal and not connected to the paper-trading account's cash or holdings. Nothing here is executed. Not investment advice.