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Finaxion Research · RSI 14: buy oversold (30/70) · single stocks · Recomputed 2026-09-10

Does RSI 14: buy oversold (30/70) work on BLK?

RSI 14: buy oversold (30/70) does not beat buy-and-hold on BLK: -11.4 points a year over 27 years.

Total return
833.5%
Buy and hold
×138
CAGR
8.7%
Sharpe
0.30
Max drawdown
-60.4%
Trades
48
Out of sample
overfit
Years
27
1×10×100×138×20002002200420062008201020122014201620182020202220242026
StrategyBLK

Findings

  1. RSI 14: buy oversold (30/70) does not beat buy-and-hold on BLK: -11.4 points a year over 27 years.
  2. Against the S&P 500 over the same window: -0.1 points a year.
  3. Total return +833.5% versus ×138 for buy-and-hold, with 48 trades.
  4. The result does not hold out of sample: it is overfit.
  5. Maximum drawdown -60.4%.
  6. It beats in neither half of the history (split at 2013).
  7. It ranks #24 of 235 markets for this strategy by annual excess over the S&P 500.

Findings derived from the full panel. Each carries its number and its denominator; the computations are reproducible with artifact 4941ce415f47.

Exactly what was tested

RSI(14) crosses below 30 → entry. RSI(14) crosses above 70 → exit. Next-close execution.

How to read it

The verdict compares the strategy with buying and holding BLK over the same window, with round-trip costs per asset class. “Out of sample” is walk-forward: the rule is fit on one stretch and judged on the next. A result that beats in the full sample but not out of it is overfit. Full methodology in the protocol. How we test.

Open this backtest with its trades   Trades (CSV)

Every strategy on BLK → · Full page for RSI 14: buy oversold (30/70) →

How to cite

Finaxion Research (2026). Does RSI 14: buy oversold (30/70) work on BLK?. Daily backtest 1962-01-01–2026-08-31, artifact 4941ce415f47. https://finaxion.app/en/research/rsi-14-oversold/blk

Not a recommendation. Past performance does not guarantee future results.