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Rakuten's double-inverse Nikkei ETF drew inflows, even as losses hit ¥22.05 billion

The fund logged a ¥22.05 billion loss in the year to March 15, almost all tied to derivatives, even as principal jumped to ¥1.45 trillion from ¥781.63 billion. Not a same-day sentiment gauge, but a sharp one-year read on appetite for downside exposure.

Jun 15, 20261 min read
Abstract illustration of mirrored market lines and collateral blocks representing a double-inverse Nikkei ETF.

Fresh money kept flowing into Rakuten Investment Management's Rakuten ETF Nikkei Double Inverse Index Linked Fund in the year to March 2026, even though the product posted a net loss of ¥22.05 billion, driven largely by a ¥22.02 billion loss on derivative dealings. The fund's principal still rose to ¥1.45 trillion from ¥781.63 billion, while net assets fell to ¥28.79 billion from ¥40.93 billion.

Fund snapshot
Year to March 15, 2026, versus the previous period.
MetricYear to March 2026Previous period
Principal1,451,587,000,000 yen781,626,000,000 yen
Net assets28,792,719,699 yen40,928,501,467 yen
Net profit/loss-22,046,771,840 yen-3,533,180,909 yen
Profit/loss on dealing of derivatives-22,023,906,520 yen-3,397,698,780 yen

That is a striking combination. The ETF is built to track the Nikkei Average Double Inverse Index, a benchmark calculated at minus two times the Nikkei 225's daily move, and it mainly uses Nikkei 225 stock index futures to do that. In other words, this is a vehicle for investors seeking amplified downside exposure, not a sleepy core holding.

For business readers, the read-through is straightforward: demand for bearish exposure stayed robust over the period even as the strategy lost money and the fund's accumulated deficit reached ¥1.42 trillion. One caveat matters. This is a period report covering the year to March 15, 2026, not a same-day snapshot of market sentiment.