Advanced Trading · Thinking Like a Portfolio
Portfolio Concepts: Not Every Trade Exists in Isolation
What You'll Learn
- What it means to think about positions as a portfolio, rather than individually
- How correlation, from earlier in this course, feeds directly into this
- Why overall portfolio risk can differ from the sum of each position's individual risk
The Big Idea
Welcome to the final module of this Academy. Let me teach you portfolio thinking: evaluating all of your open positions together as a connected whole, rather than judging each one purely in isolation. This builds directly on the correlation concept from earlier in this course, since how positions relate to each other changes what their combination actually means for overall risk.
Let's Break It Down
Remember the correlation lesson from earlier in this course: highly correlated positions can behave, in combination, much more like one larger position than several genuinely separate ones. Portfolio thinking takes this seriously by evaluating overall risk across all open positions together, not just by adding up each position's individual risk per trade from Risk Management as if they were fully independent.
This means overall portfolio risk can be meaningfully different from what it would appear to be if every position's risk were simply summed independently. Several highly correlated positions, each individually sized within a reasonable risk-per-trade limit from Risk Management, can still combine into a larger overall risk than intended if they all tend to move together.
Practically, this means periodically stepping back and asking not just "is each individual position sized correctly," but "what does my combination of open positions look like together, and how correlated are they with each other?" This is a genuinely different, broader question than evaluating any single trade on its own.
Real Example
A single ship's captain manages that one vessel's own risks. A fleet manager instead has to think about the fleet as a whole. If every ship in the fleet is sailing through the same specific storm system at the same time, the fleet's overall risk is meaningfully different than if each ship's individual risk were simply considered on its own, in isolation.
Why It Matters
Portfolio thinking is what ties the correlation concept from earlier in this course directly into practical risk management. It is the difference between correctly sizing each individual position and correctly understanding what your entire combination of positions actually represents together.
Common Mistake
Please do not evaluate each open position's risk in complete isolation, without considering how they relate to each other. Correctly sized individual positions can still combine into a much larger overall risk than intended if they are highly correlated with each other.
Quick Check
Why can overall portfolio risk differ from simply summing each position's individual risk?
Key Takeaways
- Portfolio thinking means evaluating all open positions together as a connected whole, not purely in isolation.
- Correlation, from earlier in this course, directly determines how positions combine into overall portfolio risk.
- Overall portfolio risk can meaningfully exceed a simple sum of each position's individual risk if they're highly correlated.
Finished reading?
Mark this lesson as complete to track your progress.