Protective Put Simulator
An educational portfolio-insurance tool for exploring how protective puts change the outcome of a $10,000 S&P 500 position across expiry, early crashes, time decay, and historical stress periods.
Explore the simulatorToronto // Finance focus
I’m David Jia. I’m interested in how businesses create value, how markets price uncertainty, and how financial analysis can make difficult decisions clearer. I’m using this space to learn, build, and share what I discover.
01 / Work
Focused work is more useful than a long list of placeholders. These live projects show how I frame questions, surface assumptions, and turn finance concepts into tools that people can actually explore.
An educational portfolio-insurance tool for exploring how protective puts change the outcome of a $10,000 S&P 500 position across expiry, early crashes, time decay, and historical stress periods.
Explore the simulatorA hands-on analytics project built around a practical finance topic. It reflects how I like to learn: start with a real question, use technology to explore it, and make the result understandable to someone else.
Open the analytics project02 / Process
This is the process I aim to use as the portfolio expands. It separates evidence from interpretation and treats valuation as a range shaped by assumptions—not a single magic number.
Start with the question, the audience, the time horizon, and what would make the work useful.
Identify sources, dates, definitions, and missing information before drawing a conclusion.
Trace the operating drivers, cash flows, tradeoffs, and incentives that shape the outcome.
Use scenarios and sensitivities to show how different assumptions change the result.
Look for risks, contrary evidence, and the conditions that would invalidate the original idea.
State the conclusion, assumptions, uncertainty, and next questions in language another person can challenge.
Working principle: context → evidence → economics → valuation → decision Facts, estimates, and opinions should stay distinguishable.
03 / Human
Finance is the professional focus, but curiosity is broader than a job title. These are the interests I keep returning to.
I like systems where every choice has a tradeoff, patience matters, and changing one assumption can change the whole path.
Trying tools and learning how things work keeps analysis practical. Technology is most interesting when it helps someone see a problem more clearly.
Stories shape how people understand businesses and markets. I’m interested in the narrative—and in checking where it agrees with the evidence.
04 / Notes