# Deep Fission, Inc. (FISN) vs State Street SPDR S&P 500 ETF Trust (SPY) · total-return overlay

LOPJLB holding-return compare (5Y). Dividends and splits. Each path starts at 0% from the first adjusted close in the window.

Deep Fission, Inc. (FISN) vs State Street SPDR S&P 500 ETF Trust (SPY) total return over 5Y: FISN -74.93%, SPY +84.60%. Regime SPY BULL. As of Oct 15, 2026. Research only.

- Interactive: https://www.lopjlb.com/vs/FISN/SPY
- API: `GET /bff/api/bigfive/compare-series?symbols=FISN%2CSPY&range=5y`

## Window

| Symbol | Window % | Worst drawdown | YTD |
|---|---:|---:|---:|
| FISN | -74.93% | -74.93% | -74.93% |
| SPY | +84.60% | -24.49% | +13.86% |

## Periods (calendar lookback)

| Symbol | 1Y | 2Y | 3Y | 5Y |
|---|---:|---:|---:|---:|
| FISN | — | — | — | — |
| SPY | +17.28% | +36.19% | +83.55% | +84.60% |

## Annual

| Year | FISN | SPY |
|---|---:|---:|
| YTD | -74.93% | +13.86% |
| 2025 | — | +18.01% |
| 2024 | — | +25.59% |
| 2023 | — | +26.73% |
| 2022 | — | -18.64% |
| 2021 | — | +6.59% |

---

Research context only. Not personalized investment advice.