Parin Mehta’s Practical Approach to Investment Position Sizing

In a recent LinkedIn post, Parin Mehta offers a refreshingly direct approach to a common investment dilemma: position sizing. Rather than providing prescriptive advice, Mehta shares a personal, pragmatic question he asks himself to determine the appropriate investment amount, emphasizing a balance between risk and potential impact.

The Core Question for Position Sizing

Mehta frames the challenge of deciding how much to invest not as a technical calculation, but as an intuitive, almost visceral, exercise. He highlights that while many seek concrete rules, his method relies on a more personal and instinctual response to risk. He asks himself:

“is it small enough that you don’t wipe yourself out, but big enough that the thought of it makes you 💩 in your 🩲a little?”

This candid question, as Parin Mehta points out, is far from the polished advice found in financial textbooks. However, he argues that its unconventional nature is precisely what makes it effective. According to Mehta, the goal is to move beyond overthinking and connect with a more embodied understanding of risk.

Moving Beyond Intellectualization

Getting Out of Your Head

Parin Mehta’s strategy is designed to sidestep the paralysis that can come from purely intellectual analysis of investment decisions. By posing a question that evokes a physical reaction, he aims to bypass the tendency to get lost in complex calculations or hypothetical scenarios. As Mehta notes, this approach:

“gets me out of my head and into my body
And to a decision quickly.”

This emphasis on bodily awareness in decision-making is a key takeaway from Mehta’s post. He suggests that a healthy dose of apprehension—enough to feel a slight unease—is an indicator of a sensible position size. It signifies that the investment is meaningful enough to matter but not so large as to be catastrophic if things go wrong.

The Value of an Unconventional Method

While acknowledging that his method is neither “elegant nor profound,” Parin Mehta champions its practical efficacy. In his view, the true value lies in its ability to provide clarity and prompt action. For investors struggling with the abstract concept of how much capital to allocate, Mehta’s personal framework offers a relatable and actionable alternative to more traditional, potentially overwhelming, financial planning advice. It’s a reminder that sometimes, the most effective tools are the ones that connect us to our own intuition and risk tolerance.