Variability Drain: The Silent Killer of Long-Term Compounding

Fabio Capela
Systematic investing , Portfolio mathematics , Compounding , Risk management , Quantitative finance , Volatility management , Long term investing , Portfolio optimization

You spend years refining your strategy. You optimize your entries and exits. You backtest it across decades. On paper, it shows strong returns. Maybe even impressive alpha. But something keeps bothering you. Despite solid average returns, your portfolio isn’t growing the way you expect. You’re not losing in any dramatic way — no catastrophic drawdowns, no obvious mistakes. But something subtle is bleeding your wealth. Quietly. Relentlessly.

Why I Never Use Stop Losses (And You Shouldn't Either)

“You should always use stop losses.”

I’ve heard this advice countless times from financial advisors, trading courses, and investment books. It’s supposed to be one of the fundamental rules of risk management—set a level where you’ll cut your losses and stick to it no matter what.

How Fractional Differencing Revolutionized My Feature Engineering for Investment Strategies

As a theoretical physicist turned systematic investor, I’ve always been fascinated by the mathematical structures underlying financial markets. While most investors focus on price movements and traditional technical indicators, I discovered that the real edge comes from understanding the deeper statistical properties of market data—particularly how to extract meaningful features that preserve both trend information and stationarity.

Why I Stopped Believing You Have to Choose Between High Returns and Low Risk

Every investor gets told the same story: if you want high returns, you have to accept high risk. Want to play it safe? You’ll have to settle for mediocre returns. It’s supposedly the fundamental law of investing, as immutable as gravity.

The One Number That Changed How I Think About Investment Risk

For years, I focused on the wrong metric when evaluating my investment performance. Like most investors, I obsessed over returns. How much did I make this month? How much did I make this year? How did my portfolio compare to the S&P 500?

The Truth About Beating the S&P 500: What 8 Years of Real Trading Taught Me

I’ve heard this phrase countless times from financial advisors, academic researchers, and fellow investors. The conventional wisdom is clear: 90% of professional fund managers fail to outperform the S&P 500 over ten years, so why should individual investors even try?

How I Built an Investment Strategy That Beat the S&P 500 by 8% Annually for 8 Years

Eight years ago, I was frustrated. Like most investors, I was putting money into index funds and watching my portfolio swing wildly with every market tantrum. The conventional wisdom said I should just “buy and hold” the S&P 500, but watching 20% drawdowns every few years while barely beating inflation didn’t feel like a winning strategy.

Why Index Funds Are Sabotaging Your FIRE Timeline: The Systematic Solution

Most FIRE investors are unknowingly adding 5+ years to their retirement timeline by sticking with “safe” index funds. While the investment world preaches the gospel of passive investing, a growing number of sophisticated investors are achieving Financial Independence faster through systematic strategies.

Systematic Investing