The Psychology of Position Sizing
Episode
42 min
Read time
2 min
Topics
Investing, Fundraising & VC, Leadership
AI-Generated Summary
Key Takeaways
- ✓24-Hour Cooling Rule: Never buy a stock on the same day you research it. Enforce a minimum 24-hour waiting period as a non-negotiable rule. Andrew admits feeling maximum excitement about a new position the morning of recording, demonstrating exactly why same-day purchases lock in emotional decisions rather than analytical ones.
- ✓Excitement Red Flags: When you start mentally restructuring your existing portfolio — calculating what to trim or sell — to fund a new position you discovered hours ago, that reorganization impulse signals emotional override. The pattern of favoring an unfamiliar company over well-researched holdings is a measurable warning sign worth tracking.
- ✓Inversion Framework for Stagnant Holdings: When a stock feels uninspiring, reframe the question from "should I sell?" to "what conditions would make holding this correct?" For Crocs, this means researching whether multi-year flat revenue is cyclical for footwear brands, rather than defaulting to selling based on frustration with the Hey Dude acquisition.
- ✓Coffee Can Default Bias: Christopher Mayer's 100 Baggers documents a case where a wife outperformed her husband's actively managed portfolio by buying identical stocks and never selling. The takeaway: default to inaction rather than action. Conscious, logic-driven inaction outperforms reactive portfolio management driven by short-term performance anxiety.
- ✓Pro/Con Monthly Portfolio Audit: Build a standardized checklist of identical questions applied to every holding on a monthly schedule. Running the same questions repeatedly normalizes the emotional response, surfaces indifference as a risk equal to overexcitement, and creates a written record to review days later when initial emotional states have shifted.
What It Covers
Steven Morris and Andrew Sather examine the two emotional extremes that derail stock decisions — excessive excitement and passive indifference — using real portfolio holdings like Crocs as case studies, and develop concrete personal systems to introduce logic-based checkpoints before emotions drive buying or selling actions.
Key Questions Answered
- •24-Hour Cooling Rule: Never buy a stock on the same day you research it. Enforce a minimum 24-hour waiting period as a non-negotiable rule. Andrew admits feeling maximum excitement about a new position the morning of recording, demonstrating exactly why same-day purchases lock in emotional decisions rather than analytical ones.
- •Excitement Red Flags: When you start mentally restructuring your existing portfolio — calculating what to trim or sell — to fund a new position you discovered hours ago, that reorganization impulse signals emotional override. The pattern of favoring an unfamiliar company over well-researched holdings is a measurable warning sign worth tracking.
- •Inversion Framework for Stagnant Holdings: When a stock feels uninspiring, reframe the question from "should I sell?" to "what conditions would make holding this correct?" For Crocs, this means researching whether multi-year flat revenue is cyclical for footwear brands, rather than defaulting to selling based on frustration with the Hey Dude acquisition.
- •Coffee Can Default Bias: Christopher Mayer's 100 Baggers documents a case where a wife outperformed her husband's actively managed portfolio by buying identical stocks and never selling. The takeaway: default to inaction rather than action. Conscious, logic-driven inaction outperforms reactive portfolio management driven by short-term performance anxiety.
- •Pro/Con Monthly Portfolio Audit: Build a standardized checklist of identical questions applied to every holding on a monthly schedule. Running the same questions repeatedly normalizes the emotional response, surfaces indifference as a risk equal to overexcitement, and creates a written record to review days later when initial emotional states have shifted.
Notable Moment
Steven realizes mid-conversation that his emotional indifference toward certain holdings — not just overexcitement — is equally dangerous. Complete logical detachment can cause an investor to miss a potential 100x return by selling too early, the same way excessive enthusiasm causes overpaying at entry.
Episode Transcript
Andrew and I have talked a lot about emotions recently, and we're gonna talk about it again today because there's basically two sides of you. Even if you don't realize there are two sides of you, more than likely. The first side is the side that just gets crazy excited about a stock and you start acting like that stock just can't lose. The other side is the side that's so uncertain you can't bring yourself to pull the trigger and or sell. So today, Andrew and I are gonna talk about taking that emotional temperature and figuring out how to control those emotions of either being too pumped up about a stock or maybe not being pumped up enough about a stock. So buckle up. Here we go. This episode is brought to you by Accenture. When your advertising operations fall out of sync, everything else follows. Spotify and Accenture are working together to reinvent the rhythm of ad sales using automation, analytics, and smarter workflows to simplify campaign delivery and access better data across the business. The result, less time spent on operations, more time connecting brands with the moments and fandoms that matter most. Learn more at accenture.com/spotify. When you need to build up your team to handle the growing chaos at work, use Indeed sponsored jobs. It gives your job post the boost it needs to be seen and helps reach people with the right skills, certifications, and more. Spend less time searching and more time actually interviewing candidates who check all your boxes. Listeners of this show will get a $75 sponsored job credit at indeed.com/podcast. That's indeed.com/podcast. Terms and conditions apply. Need a hiring hero? This is a job for Indeed sponsored jobs. You're tuned in you're tuned in to the investing for beginners podcast investing for beginners podcast. The show for the long term investor. We cut through the noise to focus on what works, compounding, discipline, and the conviction to buy wonderful businesses and stick with them. Your path to financial freedom start now. And welcome back to investing for beginners. My name is Steven Morris. And across from me is Andrew Sather. And today, once again, we're talking about the emotional roller coaster that is investing. And the reason, Andrew, I think this is so important and why we talk about it so much is because, you know, I've been through a lot of stuff in my life, but but investing is one of the most emotional, emotionally challenging, things I've ever done in my life. Like, you know, I I would say it rivals a lot of, you know, starting your own business, things like that. Like, it it's very tough, especially when it comes to managing your emotions. I don't know. Do you struggle with that too? Is it or is it just, like, water off a duck's back for you? Like, meh, whatever. Well, this morning, I was, like, getting really way too excited about the stock, and …
Get the full transcript (6,860 words) + summary by email — free
One-time email with the complete transcript and AI summary of this episode. No account needed.
One email, no spam. We’ll also show you what SignalCast does.
You just read a 3-minute summary of a 39-minute episode.
Get Investing for Beginners summarized like this every Monday — plus up to 2 more podcasts, free.
Pick Your Podcasts — FreeKeep Reading
More from Investing for Beginners
Path to Confidence: Build an Investing Playbook
Oct 1 · 43 min
Huberman Lab
Neuroscience of Emotions & Tools for Improving Emotion Regulation | Dr. Ralph Adolphs
Aug 17
More from Investing for Beginners
AAR69 - Behind the Curtain - How Money Actually Moves
Sep 29 · 51 min
a16z Podcast
Aaron Levie, Steven Sinofsky & Martin Casado: How Do You Secure a World of AI Agents?
Sep 26
Books, tools, and gear mentioned in this episode
SignalCast may earn commission on purchases via these links. As an Amazon Associate, SignalCast earns from qualifying purchases.
Books
100 BaggersRecommendedby Christopher Mayer
“Christopher Mayer's 100 Baggers documents a case where a wife outperformed her husband's actively managed portfolio by buying identical stocks and never selling.”
More from Investing for Beginners
We summarize every new episode. Want them in your inbox?
Path to Confidence: Build an Investing Playbook
AAR69 - Behind the Curtain - How Money Actually Moves
Cummins (CMI): Record Quarter, Falling Stock — What Wall Street Sees
Path to Confidence: Why the Best Investors Rarely Swing
AAR68 - Correcting for Financial Mistakes
Similar Episodes
Related episodes from other podcasts
Huberman Lab
Aug 17
Neuroscience of Emotions & Tools for Improving Emotion Regulation | Dr. Ralph Adolphs
a16z Podcast
Sep 26
Aaron Levie, Steven Sinofsky & Martin Casado: How Do You Secure a World of AI Agents?
The Jordan Harbinger Show
Sep 18
1384: Have You Lost Chance at Transatlantic Romance? | Feedback Friday
Huberman Lab
Sep 7
How Mitochondria Control Your Metabolism | Dr. Jared Rutter
a16z Podcast
Aug 25
The New Economics of AI | Martin Casado & Steven Sinofsky
Explore Related Topics
This podcast is featured in Best Investing Podcasts (2026) — ranked and reviewed with AI summaries.
Read this week's Investing & Markets Podcast Insights — cross-podcast analysis updated weekly.
You're clearly into Investing for Beginners.
Every Monday, we deliver AI summaries of the latest episodes from Investing for Beginners and 192+ other podcasts. Free for one show.
Start My Monday DigestNo credit card · Unsubscribe anytime