Investing
Band-based or calendar rebalancing: what the comparisons show
Both rules work when they force trade against drift; the measured differences are smaller than the assumptions either way.
Author
Karim Al-Rashid
Karim Al-Rashid tracks company results and property markets with a habit of looking past the loudest number in the room. He explains mortgages and refinancing arithmetic, covers architecture and how buildings age, and reports the quant funds and data vendors behind market signals.
Articles by Karim Al-Rashid
Investing
Why doesn't your index fund match its index?
Tracking difference decomposes into fees, index-replication frictions, sampling and timing — each measurable, none mysterious.
Analysis
How do you detect lookahead bias in someone else's backtest?
A checklist of audit questions — each targeting a specific leak channel — that turns a suspicious track record into a diagnosed one.
Investing
How does the wash-sale rule actually work?
A 61-day window, a substantially identical security, and a deferred loss — the mechanics as the IRS writes them.
Investing
How does an expense ratio compound against a portfolio?
The fee is charged on assets every year, so its cost compounds at exactly the rate the portfolio grows — here is the arithmetic.