HomeAuthorsGiacomo Melillo
Giacomo Melillo

Giacomo Melillo

Founder & Product Owner at Awalyt

Frankfurt, Germany

About Giacomo

I'm a passionate investor and tech engineer. Italian-American, based in Frankfurt, and today building Awalyt as Founder and Product Owner.

My path didn't start in finance. Born in Naples in 1993, I studied Aerospace Engineering at Università Federico II and graduated with top honors (110/110 cum laude). I started my career on the technical side, where precision wasn't optional, and over time moved into management and business roles.

In parallel, investing became more than a hobby. I studied it on my own for years — academic papers on portfolio theory, fundamental analysis, the Bogleheads literature. The issue I kept running into wasn't a lack of information. It was the absence of one place where a serious investor could pull everything together. The tools I wanted were scattered across too many platforms, and most of them felt cold and technical, hard to approach unless you already knew exactly what you were looking for. I wanted something more human. A real platform, not a collection of disconnected tools.

Awalyt started as something I wanted for myself. It grew into a product I thought other serious investors would want too.

The goal is simple. Give you data you can access, understand, and actually use — even if you don't have years of investing experience but you want to learn, improve, and make decisions based on numbers rather than opinions. Investing is a long-term game, and the tools you use should reflect that.

Awalyt is built around a few ideas I genuinely believe in. It should be transparent. You get to see the data and the method behind it, not just the conclusion. It should help people understand what they're actually doing with their money, not hand them a number they have to trust on faith. Making mistakes is part of investing for everyone — what matters is being able to learn from them and do better the next time. And a normal investor, without years of experience, should still be able to read the results and make a real decision on their own.

Always open to talking with other founders, investors, and advisors.

What I write about

  • Portfolio Backtesting
  • ETF Analysis
  • Fundamental Analysis
  • Portfolio Risk Metrics
  • Asset Allocation
  • Daily-Precision Financial Data

Recent articles by Giacomo

If You Invested $10,000 in VOO 10 Years Ago, Here's What You'd Have Today [2026]
New
10-Year Backtest · Real Numbers
Portfolio & ETF Comparison

If You Invested $10,000 in VOO 10 Years Ago, Here's What You'd Have Today [2026]

A daily-data backtest of $10,000 invested in VOO from April 2016 to April 2026. The final number, the worst year, the best year, and what the path actually looked like.

Apr 29Giacomo
9 min
60/40 vs 80/20 vs 90/10: VOO/BND Backtest Results (15 Years) [2026]
New
Data-Driven
Portfolio & ETF Comparison

60/40 vs 80/20 vs 90/10: VOO/BND Backtest Results (15 Years) [2026]

We backtested 60/40, 80/20, and 90/10 VOO/BND allocations over 15 years of daily data. See the real returns, drawdowns, and why 60/40 won on risk-adjusted metrics.

Apr 27Giacomo
8 min
VOO vs QQQ: Which Should You Buy? [2026 Data + Overlap Analysis]
New
ETF Head-to-Head
Portfolio & ETF Comparison

VOO vs QQQ: Which Should You Buy? [2026 Data + Overlap Analysis]

VOO vs QQQ compared with 15 years of daily data. Returns, risk metrics, holdings overlap (94.8%), sector breakdown, and a practical framework for choosing.

Apr 21Giacomo
11 min
SPY vs VOO vs IVV: Which S&P 500 ETF Should You Pick? [2026]
ETF Head-to-Head
Portfolio & ETF Comparison

SPY vs VOO vs IVV: Which S&P 500 ETF Should You Pick? [2026]

We backtested SPY, VOO, and IVV over 15 years with daily data. The performance difference is tiny — here's what should actually drive your decision.

Apr 17Giacomo
10 min
How to Tell If a Stock Is Overvalued or Undervalued: A Framework with Real Examples [2026]
Valuation Framework with Real Data
Stock Analysis

How to Tell If a Stock Is Overvalued or Undervalued: A Framework with Real Examples [2026]

A single P/E ratio can't tell you if a stock is cheap or expensive. A 4-layer valuation framework, applied to Adobe and NVIDIA, shows why.

Apr 14Giacomo
13 min
How Often Should You Rebalance Your Portfolio? A 14-Year Backtest of 4 Strategies [2026]
Rebalancing Tested with Real Data
Rebalancing & Allocation

How Often Should You Rebalance Your Portfolio? A 14-Year Backtest of 4 Strategies [2026]

Monthly, quarterly, semi-annual, or annual? 14 years of daily-data backtests show one clear loser, and three frequencies that tied on every metric.

Apr 13Giacomo
12 min
Backtesting a Portfolio: 6 Common Mistakes and How to Avoid Them [2026]
Backtesting Best Practices
Best Practices & Reporting

Backtesting a Portfolio: 6 Common Mistakes and How to Avoid Them [2026]

Most backtests mislead, not because the math is wrong but because of how they're set up. Six common mistakes, with real examples and fixes.

Apr 10Giacomo
11 min
Daily vs Monthly Data in Backtesting — Does It Matter? [2026]
Data Accuracy Deep Dive
Backtesting & Strategy Design

Daily vs Monthly Data in Backtesting — Does It Matter? [2026]

Daily and monthly backtesting data produce similar returns but dramatically different risk metrics. We show exactly how much max drawdown, volatility, and Sharpe ratio change with real examples — and why it matters for your portfolio decisions.

Apr 6Giacomo
11 min
Does Rebalancing Actually Improve Returns? We Tested the All Weather Portfolio Over 16 Years [2026]
Rebalancing Deep Dive with Real Data
Backtesting & Strategy Design

Does Rebalancing Actually Improve Returns? We Tested the All Weather Portfolio Over 16 Years [2026]

We ran two backtests on Ray Dalio's All Weather Portfolio — one with annual rebalancing, one without. The rebalanced version returned less. But the full picture tells a different story. Here's what 4,023 daily data points reveal about what rebalancing actually does.

Apr 6Giacomo
13 min

Let's connect

Always open to talking with other founders, investors, and advisors.