The Summer Nikkei Fade
Last week we bought the yen for the summer risk-off bid. This is its equity mirror — short the Nikkei from late July into late August, the most yen-sensitive index in the world catching the same current from the other side. 23 of 36 winners, 7 of the last 10.
- NDX, 1kGrowth, SPX longs (Late-May Launchpad, May 21) & Independence Day Launch (Jul 2) — through winter
- GOLD long (Jun 18) — through Jan 17, 2027
- CORN short (May 28) & the Jun 4 pair — through Nov 26 / Oct 4
- NG short (Jun 25) — through Mar 25, 2027
- SOYBEANS short (Jul 9) — through Aug 8
- YEN long (August Yen Bid, Jul 16) — through Aug 22
NIKKEI short · Jul 23 → Aug 20
This trade does not stand alone, and pretending it did would be dishonest. It is the equity leg of last week's August Yen Bid. The Nikkei is the most currency-driven of the major indices — Japan's giants are exporters, and their earnings translate inversely to the yen. When the yen catches its summer safe-haven bid, the Nikkei mechanically feels the drag, and the same forces that lift the currency — carry-trade unwinds, thin August liquidity, the reflex out of risk — press on Tokyo equities directly. Two markets, one current.
The seasonal record is real on its own terms: over 36 years the short has worked in 23 (64%), with a +2.60% median and — the reassuring part — a shallow left tail. The worst year in the entire sample was just −8.9% (2006); there is no −30% disaster lurking, which is exactly what you want in an index short. The modern read holds: 7 of the last 10 years green, the misses (2020, 2022, 2025) all shallow. Add Japan's mid-August Obon holiday, which drains domestic participation and lets the export-earnings math and the yen move the tape unopposed, and the calendar has an extra tailwind the S&P version lacks.
The most important line in this post is about sizing, not signal. If you took the yen long last week, you already own this risk-off exposure — a firmer yen is a weaker Nikkei. Stacking both at full size is not diversification; it is one bet, doubled. For a single-theme book, treat the yen and the Nikkei as one position and pick the cleaner expression. For a multi-instance book, run both, but half-size each so the combined risk equals one. The only year that punishes the pair is a summer melt-up where risk stays bid and the yen stays weak — 2025 was a whiff of it (Nikkei short −4.2%, yen long +0.6%).
Vehicles: short /NKD (CME Nikkei futures) for the cleanest read. In an equity account, short EWJ — and note the quirk: EWJ is unhedged, so a US-dollar short there captures the falling index and the rising yen at once, which compounds in your favor in exactly the regime this trade targets. Or buy EWJ puts for defined risk into the BOJ meeting. Size it as the diversifying tail it is — small, and paired, not piled.
The week ahead
| Day | Notes | Trades active |
|---|---|---|
| WedJul 15 | Japan CPI midweek; BOJ commentary in focus. | |
| ThuJul 16 | The August Yen Bid fires (last week's post) — the currency leg of this pair. | |
| MonJul 20 | Week 30 opens. | |
| ThuJul 23 | The Summer Nikkei Fade fires at the close. The equity mirror of the yen trade enters. |
SHORTNIKKEI+2.60%
Exit Aug 20
|
| FriJul 31 | BOJ policy decision — the hold's key catalyst. A hawkish tilt drives both legs. | |
| ~Aug 13Obon | Japan's Obon holiday week — domestic liquidity thins, moves amplify. |
Same catalyst as the yen leg: the July 31 BOJ meeting sits inside the hold. A hawkish surprise lifts the yen and pressures the Nikkei simultaneously — the scenario that pays the pair.
Full history — 36 years
Nikkei 225, SHORT P&L, Jul 23 close → Aug 20 close. Note the shallow losses — the worst year in 36 was −8.9%.
| Year | Short P&L | Year | Short P&L |
|---|---|---|---|
| 1990 | +16.9% | 2008 | +3.5% |
| 1991 | +4.7% | 2009 | -6.0% |
| 1992 | +4.8% | 2010 | +2.7% |
| 1993 | -4.4% | 2011 | +13.2% |
| 1994 | -1.1% | 2012 | -7.8% |
| 1995 | -8.7% | 2013 | +9.4% |
| 1996 | +0.2% | 2014 | -0.8% |
| 1997 | +4.4% | 2015 | +3.1% |
| 1998 | +4.9% | 2016 | +0.4% |
| 1999 | -3.2% | 2017 | +2.5% |
| 2000 | +1.6% | 2018 | +0.9% |
| 2001 | +3.0% | 2019 | +4.4% |
| 2002 | +5.8% | 2020 | -0.7% |
| 2003 | -7.0% | 2021 | +2.9% |
| 2004 | +2.7% | 2022 | -4.4% |
| 2005 | -4.5% | 2023 | +3.8% |
| 2006 | -8.9% | 2024 | +3.9% |
| 2007 | +12.4% | 2025 | -4.2% |
Read. A 64% base rate with a −8.9% worst case is a rare shape for a short — the downside is contained because the Nikkei simply does not melt up in August. The biggest winners (1990, 2007, 2011) were global risk-off events; the losses were shallow drifts higher. Paired with the yen leg and sized as one, it is the book's cleanest expression of the summer risk-off season.