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flag Short interest in defense ETFs surged in late February 2026, with MISL and IDEF seeing massive spikes in shares sold short.

flag Short interest in the First Trust Indxx Aerospace & Defense ETF (MISL) jumped 1,445% to 142,939 shares by February 13, 2026, with a days-to-cover of 0.5 days. flag The iShares Defense Industrials Active ETF (IDEF) saw short interest soar 4,056% to 767,142 shares, representing 43.6% of its shares sold short, with a 7.6-day cover ratio. flag Both ETFs experienced modest declines in price and below-average trading volume on Wednesday, February 25.

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