Does the Parabolic SAR strategy beat buy & hold on Berkshire Hathaway? (BRK-B · backtested honestly)
Wilder's 'stop and reverse' dot: a trailing stop that accelerates toward price as a move runs, flipping the trend reading when price crosses it.
Over this period, Parabolic SAR on Berkshire Hathaway returned -7.6%, while simply buying and holding returned +89.3% — it lagged buy & hold by 96.9 points, with a worst drawdown of -32.9%. It traded 62 times and sat in cash about 45% of the time. It's a mechanism you test.
It lagged buy & hold over this window — that's a result, and a backtest you can kill for free just did its job. Re-tuning this same idea until it looks better only adds another shot at looking good by luck, so the honest next move is a fresh one: test a different strategy on Berkshire Hathaway, or build your own — free. Most ideas die cheaply right here, and that's exactly how the rare one that holds up gets found.
Or stop here — walking away from an idea that didn't beat simply holding is a result, not a failure.
Run it yourself
Change the parameters and the window, then re-run — no account needed.
Change the rules? Open the Parabolic SAR rules on Berkshire Hathaway in the no-code builder — the same rules tested here — and make them your own.
Open in the builder →Two real trades from this backtest
Shown at the modeled fills — entries at the next open; a stop at its level, or at that day's open if the day opened past it; a target at its level; costs on. A single trade is never a signal and says nothing about the next one — not the best or worst, a middling winner and a middling loser among the completed trades.
62 trades total — 29 winners, 33 losers (47% won). Below is one of each, not a scoreboard.
- Entry. A long entry fired; filled at the next open on 2024-06-25 at $414.00 — never the signal bar's own close.
- Held. 5 daily bars.
- Exit. Exited on 2024-07-02 at $404.02 (the exit rule fired (filled at the next open)).
- Result. -2.51% after costs.
The worst single trade in this whole test reached -11.51%.
- Entry. A long entry fired; filled at the next open on 2022-01-28 at $307.68 — never the signal bar's own close.
- Held. 17 daily bars.
- Exit. Exited on 2022-02-23 at $316.08 (the exit rule fired (filled at the next open)).
- Result. +2.63% after costs.
Trading costs + slippage (0.10%) are already deducted from every figure above. One trade is never the edge — it's the whole distribution (the win rate, the losers, the reality-check) that matters; this just makes the mechanics concrete. It describes the past; it is not a prediction.
A live badge that re-runs itself and links back here. Free to embed on any blog, newsletter or forum — it shows the honest result, beat or lagged.
<iframe src="https://stratsemble.com/embed/berkshire-hathaway-parabolic-sar-backtest" width="360" height="340" style="border:0;border-radius:12px;max-width:100%" loading="lazy" title="Does the Parabolic SAR strategy beat buy & hold on Berkshire Hathaway?"></iframe>See which strategies actually beat buy & hold — and which only look like they do.
Free, in seconds, no sign-up. Put any famous strategy to the proof the honest way — real costs, every loss shown, measured against simply holding — so a tip, a guru, or your own hope can't fool you.
- Prove any strategy — free
- See if it's an edge, or just luck
- Read today's names that cleared every check
Put it to the proof the honest way — real costs, every loss, measured against simply holding. Free, no sign-up.
Prove it →Paste their exact claim and watch the honest engine put it to the test — free, losses and all.
Test the claim →Check a strategy against the real drawdown and profit-target rules of a prop-firm evaluation.
Put it through →an honest backtest — real costs on, measured against simply buying & holding
- • The strategy line is Parabolic SAR on Berkshire Hathaway; the dashed line is simply buying and holding BRK-B. Beating the dashed line is the whole point — many strategies don't.
- • Max drawdown is the worst peak-to-trough fall you'd have sat through. A higher return with a much deeper drawdown is not obviously better.
- • Every fill assumes next-open execution with costs & slippage on — no acting on prices you couldn't have known.
- • A small number of trades means a small sample. Treat a great-looking result on a handful of trades with suspicion.
This is a hypothetical backtest of a well-known mechanism on past data. It is not advice, not a prediction, and not a claim that the strategy works. We hold no funds and place no orders. The value here is the ability to test an idea honestly — see where it would have helped, and where it would have hurt — before you ever risk real money on your own broker.
How this is computed → · who's behind it · where a backtest fits
See what actually beats buy & hold — most don't, here are the rare few that do →