Herb Greenberg’s Red Flag Alerts

Herb Greenberg's

Red Flag Alerts

Herb Greenberg | On the Street, also known as Herb on the Street, is a culmination of my 50 years reporting on, writing about and researching stocks, companies, the markets and virtually any and  every industry.

This is what I do. This is what I love.

If there’s such a thing as true passion, professionally, this is it. It’s in my DNA to fly red flags, but I like flying a few green ones, too... while poking holes in conventional wisdom and going out of my way not to follow the herd.

Red Flag Alerts

View All Red Flag Alerts

Yes Fundamentals Still Matter

May 7, 2025

The Risk With Stocks Is Real...

... And why subscribing to my Red Flag Alerts will help you maneuver around it.

View Full Post

Interested in More?

On Life

My random thoughts that have nothing to do with business or investing.

Case Studies

Just what the title says - “Case Studies”

Notes

Ideas in progress and behind-the-scenes glimpses.

In Case You Missed It

Catch up on exclusive content from Herb as he talks through business, life, and more.

View Archives

What subscribers are saying

“I read your SF Chronicle column years ago while in college and thought you offered interesting, well-written content. I am excited to be able to access your thoughts and research again!”

Kevin Ward

Paid Subscriber

“I am a relatively young PM who grew up watching you on CNBC. You inspired me to root out the bad management teams and taught me how to look for red flags.”

Chris

Paid Subscriber

“Herb is a legend, a colleague in a previous era at MarketWatch, and a source of huge value for investors.”

Bill Bishop

Paid Subscriber

Frequently Asked Questions

View all FAQs

How are Red Flag Alerts different from Herb on the Street?

Herb on the Street, my signature brand, is mostly topical opinion, observation and topical commentary on the stocks, the markets, industries and business. It’s also where I fly my occasional green flags.

Red Flag Alerts is exactly what its name implies: It’s generally stock and company specific.

How often do you plan to publish?

Are Red Flag Alerts designed for short-sellers?

I created Red Flag Alerts to highlight stocks to avoid. The concept is simple: with thousands of publicly traded stocks, why pick these?

That’s not to say short-sellers won’t find good ideas here. Since launched in May 2023, almost all of my Red Flag Alerts names have lagged the market and remained in the red.