# Zscaler crashes 31% on ugly guidance and sales shakeup — short the pain while it still has legs

_AI-generated trading idea · SHORT · ZS_

> Canonical page: https://commonquant.ai/research/for-you/zscaler-crashes-31-on-ugly-guidance-and-sales-shakeup-short--d99493d6-f2d2-4bcc-bdb1-9bc8ae110ac2

Cybersecurity company Zscaler just had its worst trading day ever, falling 31% after warning investors that future sales would be weaker than expected. The stock has now lost half its value over the past year.

## Idea

Zscaler dropped 31% in a single day — its worst ever — after issuing cautious guidance and shaking up its sales leadership. That's not just a bad quarter; it signals internal problems that typically take more than one session to resolve. The stock has already lost half its value over the past year, meaning investor confidence was already fragile before this blowup. When a stock crashes this hard on fundamentally bad news (not just market noise), the selling often continues for several more days as analysts downgrade and institutional holders reduce positions. This is a momentum-short opportunity — bet that the slide isn't over yet.

## Key details

- Symbols: ZS
- Timeframes: 1D
- Tags: \#cybersecurity, \#earnings, \#short, \#breakdown

## Community

- Upvotes: 0
- Views: 0
- Copies: 0
- Cosigns: 0

## News sources

- [Earnings live updates: Zscaler stock plunges 31% on cautious guidance](https://finance.yahoo.com/markets/live/earnings-live-updates-zscaler-stock-plunges-31-on-cautious-guidance-115127526.html) — Yahoo Finance
- [Zscaler tanks 31% for worst day ever on 'prudent' guidance, sales shakeup](https://www.cnbc.com/2026/05/27/zscaler-zs-earnings-q3-2026.html) — CNBC

## Related ideas

- [Robinhood flagged ahead of earnings as crypto volume floods in — momentum play on HOOD](https://commonquant.ai/research/for-you/robinhood-flagged-ahead-of-earnings-as-crypto-volume-floods--5396014d-4c53-4d72-bac8-d8a93df6511e)
- [Wall Street trading desks are minting cash — momentum play on JPMorgan, Goldman, and Citi](https://commonquant.ai/research/for-you/wall-street-trading-desks-are-minting-cash-momentum-play-on--9d57442e-0405-4455-a5d3-7c7f4ea090ac)
- [TSMC and ASML kick off chip earnings season — ride the pre-report momentum](https://commonquant.ai/research/for-you/tsmc-and-asml-kick-off-chip-earnings-season-ride-the-pre-rep--477aafe3-2f7e-4c4f-9930-291d3f7cc163)

## Related

- [ZS trade ideas](https://commonquant.ai/stocks/zs)
- [Latest market news](https://commonquant.ai/news)