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

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

RSI 14: buy oversold (30/70) does not beat buy-and-hold on ZBH: -3.5 points a year over 25 years.

Total return
69.2%
Buy and hold
292.2%
CAGR
2.1%
Sharpe
0.02
Max drawdown
-63.1%
Trades
49
Out of sample
overfit
Years
25
0.6×1×3.4×6.3×2002200420062008201020122014201620182020202220242026
StrategyZBH

Findings

  1. RSI 14: buy oversold (30/70) does not beat buy-and-hold on ZBH: -3.5 points a year over 25 years.
  2. Against the S&P 500 over the same window: -7.5 points a year.
  3. Total return +69.2% versus +292.2% for buy-and-hold, with 49 trades.
  4. The result does not hold out of sample: it is overfit.
  5. Maximum drawdown -63.1%.
  6. It did not beat before 2014 and started afterwards.
  7. It ranks #150 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 ZBH 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 ZBH → · Full page for RSI 14: buy oversold (30/70) →

How to cite

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

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