1. The record-vs-history screen — one statistic that identifies a blow-off without any valuation work
The repeatable method
- For any market or sector that has run hard, compute the return over the recent window against the return over its entire prior history — not a P/E, not a z-score, just cumulative gain in months versus cumulative gain in decades.
- Treat "more return in the last N months than in the previous M years" as a standalone blow-off verdict: it is arithmetic that can only be produced by a vertical price move, so it survives any bullish narrative attached to it.
- Act on the statistic itself. It gives no top-tick, so it is a signal to begin selling, not to wait for confirmation — expect to be early.
- Keep a source that publishes these long-history comparisons (here, Grant Williams' monthly missive) so the trigger arrives from outside your own positioning.
Here: by June 18th the KOSPI "had generated more return in the past eight and half months than it had in the prior 45 years of its existence" (Grant Williams, KOSPI TURVY). Haymaker had already acted on the same character of move: an outright sell of EWY on May 6th at $151 — early, then vindicated (−17% since).
Watch for
- Any "more in X months than in the prior Y years / than ever before" record; how far price sits above its own long-run trend; whether the record is being celebrated rather than questioned.
2. The two-stock engine test — find what an index actually is before you own or short it
The repeatable method
- Before treating a country ETF or a sector index as diversified exposure, decompose it: what fraction of the move came from how few names?
- If two or three securities drive it, the wrapper is a concentrated bet in disguise — analyse those securities, not the index label, and size the position accordingly.
- Then look for the same names inside other indexes you own. Shared constituents (or shared end-market) mean the exposures are one position, not two.
Here: "the main driver of this KOSPI blow off was its semiconductor sector. In reality, that is made up of essentially two stocks: Samsung and Hynix." So "South Korea" (EWY) was a memory-chip bet, and the same bet sat inside SOXX — which is why both broke in the same five weeks.
Watch for
- Top-two/top-five index weights and their share of the move; overlap between a "country," "sector" and "theme" fund you hold; the moment the two-stock engine rolls over.
3. The offshore leading indicator — read the same trade where it is most extreme, then date the domestic turn from it
The repeatable method
- Identify the market where a global theme is expressed in its purest, most levered form (usually a smaller market with a dominant industry).
- Track that market as the theme's leading indicator: it inflates first and cracks first, because it holds the marginal, most-committed buyer.
- When it breaks, date-stamp the break and check whether the domestic proxy started declining in the same window. A matching start date confirms one unwinding trade rather than two coincidences.
Here: Samsung + Hynix −40% over five weeks — "this is also when the U.S. Semiconductor Index, the SOXX, began its descent." Korea cracked, the US semis followed on the same clock.
Watch for
- The purest offshore expression of your theme; aligned start dates between the offshore break and the domestic index; whether the domestic decline is still being explained away locally.
4. "Cheap doesn't save you" — retire the low-multiple defence once earnings are cyclical-peak
The repeatable method
- When the bull case for a fallen sector reduces to "but it's cheap on earnings," check which earnings: a modest P/E on peak-cycle profits is a high P/E on normalised profits.
- Look for the live counter-example — a comparable name that has already fallen hard while reporting excellent results at a low multiple. If cheapness plus good news failed there, it is not a floor here.
- Conclude that the price is being set by flows into (and now out of) the theme, not by fundamentals — so fundamental strength is no reason to hold through the unwind.
Here: Samsung and Hynix fell 40% "despite ballistic earnings, leading to modest P/Es"; and MU — the name whose fans "were quick to point out how cheap [it was] even at [its] peaks" — "has lost one-third of its market cap since June 24th… despite reporting blow-out earnings."
Watch for
- Low multiples resting on record margins; a stock falling on a beat; the bull case migrating from growth to value as the price drops.
5. Selling into the hockey stick — a systematic scale-out that does not require calling the top
The repeatable method
- Define the trigger by chart shape, not by a price target: once a position enters the near-vertical "hockey stick" phase, the scale-out begins.
- Sell in tranches on the way up (dollar-cost-average out) rather than trying to pick the peak — accept being early as the cost of a good average exit price.
- Apply it "irrespective of how exciting the story sounds": the rule is triggered by price behaviour, so a compelling narrative or a cheap multiple is explicitly not an override.
- Reserve the outright sell (rather than a trim) for the rare case where the record-vs-history screen fires — the discipline is graduated, not binary.
Here: "This once again demonstrates the prudence of systemically selling into these hockey stick-like moves, irrespective of how exciting the story sounds" — the same default tactic applied to gold miners in the Jul-27 update, and escalated on EWY to "one of our very rare outright sell recommendations."
Watch for
- The point where a chart's slope goes near-vertical; whether your tranches are pre-scheduled; the temptation to stop selling because the story has improved.
6. The bounce is an exit — pre-commit to selling the rally before it arrives
The repeatable method
- After a violent decline, expect a sharp counter-trend rally: "the sell-off… has been so intense that a bounce before long is possible, even probable."
- Decide in advance what the bounce means. If the decline followed a genuine blow-off, the rally is an opportunity "to once again reduce exposure," not a re-entry.
- Scale the caution to the prior excess — "the bigger the bubble, the bigger the bust" — so the larger the preceding blow-off, the more of any rally you sell.
- Distinguish this from a washout buy setup: the same team buys beaten-down groups (miners, oil services) when the drawdown follows apathy rather than mania. The prior mania is what flips the bounce from entry to exit.
Here: SOXX — a probable bounce "will likely be an opportunity to once again reduce exposure for disciplined investors," because "History is alpine lake clear that the bigger the bubble, the bigger the bust." Same logic keeps EWY a sell after a 17% fall: the fall is small relative to the run.
Watch for
- How much of the prior advance has actually been given back; whether the drawdown followed euphoria or apathy; a rally arriving on no fundamental change.