Role in the portfolio
The Core Algo is the base layer of the portfolio. It is designed to bring structure and overall stability, while the broader portfolio can include additional elements beyond it.
The strategy only trades Nasdaq 100 stocks. Its historical testing was run on the Nasdaq 100 back to 1993 and on the S&P 500 back to 1957 in order to evaluate resilience across many different market environments.
The long S&P history was used as a stress test across a wide range of scenarios, including the 1987 crash, the dot-com collapse, the global financial crisis, COVID-19, oil shocks, stagflation, recessionary periods, and housing and credit crises.
In live trading, slippage sometimes helps and sometimes hurts but tends to balance out, while fees remain low due to modest trading frequency. Taking these frictions into account, I consider a long‑term net CAGR of around 30-50% per year as an expected target.
Backtests
Backtest results exclude slippage and transaction fees and are a technical tool to assess whether a strategy can theoretically work. The Core Algo was tested on survivorship‑bias‑free data, with new components first validated on shorter 5–10 year windows before being applied to the full sample and cross‑checked on different indexes.
Over multiple decades the backtests show exponential growth, but these results are not fully realistic. A six‑month live run in 2025 highlighted the human factor: as a discretionary trader, I repeatedly overrode signals, which degraded performance, and I learned to let the system run without interference.