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Author: Stephen Guilfoyle

Stephen "Sarge" Guilfoyle is the founder and President of Sarge986 LLC, a family run trading operation. An NYSE floor trader for over 30 years, Guilfoyle has served as the Chief Market Economist for Stuart Frankel & Co., the U.S. Economist for Meridian Equity Partners, and as a Vice President in Block Trading and Investment Banking with Credit Suisse over the years. Guilfoyle earned his nickname “Sarge” while serving as an actual sergeant in reserve components of the U.S. Marine Corps, and U.S. Army while simultaneously working on Wall Street. He self-identifies as a day trader, long-term investor, and anything in between. He believes in removing the emotion out of the decision-making process and trusting the data. Look to Guilfoyle to prepare you for the trading day with his popular early morning Market Recon newsletter on TheStreet Pro, which provides a mix of fundamentals, technical analysis, economic commentary and trading ideas.

Bonds Crash the Party

Avatar photo Stephen Guilfoyle on October 1, 2026

A bond market selloff muted what should have been a rally for equities on Wednesday. Also, feel that inflation chill?

I’m Eyeing Northrop After Boeing’s $20 Billion Navy Update

Avatar photo Stephen Guilfoyle on September 30, 2026

Though Northrop Grumman lost out to Boeing in a large deal, it seems ripe for a trade.

Selling 1 Small-Cap Name, Buying 4 as Market Selloff Calls for Finesse

Avatar photo Stephen Guilfoyle on September 30, 2026

Our small-cap portfolio is reeling a bit.

A Chill Down Wall St. as Confidence Cools

Avatar photo Stephen Guilfoyle on September 30, 2026

We felt a cool breeze on the market as the Consumer Confidence survey hit with an ugly headline number … but bad data inputs can produce counterintuitive market outputs…

Keeping My Price Target as AMD Lands ‘AI Godmother’ in Bold $8.2B Move

Avatar photo Stephen Guilfoyle on September 29, 2026

After AMD’s parabolic rise, Lisa Su is making an aggressive acquisition, while analysts raise the bar for the stock.

Some Good News After a Harsh Selloff for Our Small-Cap Pharma Name

Avatar photo Stephen Guilfoyle on September 29, 2026

Ionis Pharmaceuticals (IONS)

We’re buying more shares after a harsh day for the position.

Is the AI Gravy Train About to Get a Yellow Signal?

Avatar photo Stephen Guilfoyle on September 29, 2026

The market may not be selling off solely because of oil and Iran. Investors may be starting to price in another troubling risk.

Our Small-Cap Name Is Tanking and Nobody Knows Why

Avatar photo Stephen Guilfoyle on September 28, 2026

Market Selloff

Ocular Therapeutix is selling off sharply, taking our small-cap portfolio down with it.

New Nvidia Price Target After $150 Billion Record Stock Buy

Avatar photo Stephen Guilfoyle on September 28, 2026

Nvidia

The elite-level AI chip firm announced a move that pushed Apple’s $110 billion buy into second place.

As Hormuz Deal Collapses, Hope Fades on Market… And So Does Rationality

Avatar photo Stephen Guilfoyle on September 28, 2026

Let’s look at how high-speed, keyword-reading algorithms have taken needed skepticism — and rationality — out of the market.

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