David Okonkwo
Fixed income and macro
Spent years on the side of the desk that sells the product and now writes from the side that buys it. Explains yields, duration and tax the way a broker rarely does: with the final number in hand.
Personal Finance
Compound interest: the calculation almost nobody finishes
Everyone repeats that compounding is the eighth wonder of the world. Almost nobody opens the spreadsheet and finds where the money is…
Aug 20, 2026 3 min read David Okonkwo
ETFs & Funds
The expense ratio is the only part of your return you actually control
You cannot choose next year's market return. You can choose what you pay to participate in it — and over thirty years that choice is worth…
Aug 14, 2026 2 min read David Okonkwo
Fixed Income
Treasuries and the mark-to-market that scares people for no reason (usually)
The safest asset in the world shows up in the statement down 13%. Here is why that happens, when it is irrelevant, and the three cases…
Aug 11, 2026 2 min read David Okonkwo
Personal Finance
Emergency fund: how much, where, and when to actually use it
The "six months of expenses" rule is a fine starting point and a poor final answer. The right number depends on three variables almost…
Aug 2, 2026 3 min read David Okonkwo