How a top CIO decides to buy, hold, or sell an earnings 'trainwreck'

It's the moment every investor dreads. A company you own reports earnings, and it's a disaster. The stock is in freefall. This is where fortunes are made or lost, and it all comes down to your process. On CNBC's The Exchange, G Squared Private Wealth CIO Victoria Green gave a brilliant breakdown of how she dissects these exact situations, providing a repeatable framework for any investor.

Case Study 1: Tesla (A HOLD) The stock was down big after the conference call. Green's take? You have to split the company in two. 'Tesla, the auto company, definitely dumpster fire right now,' she admitted. But 'Tesla, the tech company, still very attractive. Robotics, full self-driving, AI... That story's alive and well.' The Lesson: Is the core long-term thesis still intact, even if the current business is struggling? For Tesla, the tech story is the main event. The car sales are just one chapter. This is a reason to hold and wait for the real story to play out.

Case Study 2: Southwest Airlines (A SELL) The stock was plunging after cutting its forecast. For Green, this was a clear sell. Why? The company has lost its identity. 'What is Southwest? Are they a discount carrier? Are they a friendly carrier? Or are they just a mean ol' regular carrier...?' she asked. They are trying to change their business model to compete with the big guys, but they don't have the planes or the brand for it. The Lesson: Has the company's fundamental reason for success ”its competitive advantage or 'moat' ”eroded? For Southwest, its low-cost, simple-service identity is gone, and the path forward is unclear. That's a broken story.

Case Study 3: Chipotle (A SELL) Worst day in 15 years for the stock. Green's analysis was sharp: 'The power of the burrito, which has taken the stock to all-time highs has been waning for a year.' Why? They've hit 'peak pricing' and are facing a tsunami of competition from rivals like Sweetgreen and Cava. Their attempt to rebrand as a 'value meal' is a tough sell when a burrito costs nearly $
25. The Lesson: Have the company's growth levers stopped working? Chipotle can no longer easily raise prices, and its market is now saturated with competitors. When the growth story stalls and competition heats up, it's often time to get out.

This framework is pure gold. When one of your stocks blows up, don't panic. Ask Green's questions: Is the long-term thesis intact? Has the competitive advantage eroded? Have the growth levers stopped working? Your answers will tell you whether you're looking at a brilliant buying opportunity or a trainwreck to abandon.