Biontech, CureVac, Playmobil, Lufthansa, Air Baltic, Thyssenkrupp – that was Monday, June 30, 2025

The stock market has long since reacted: Weapons manufacturers' shares are outperforming almost all tech and crypto stocks, and defense ETFs are booming . What for years only moved military nerds is the hottest story on the market in 2025.

Until recently, defense securities were considered incompatible with sound investment practices—"uninvestable." Now, even investors committed to sustainability have discovered the sector. So, will weapons soon be considered sustainable? The battle for the monetary label is currently dividing the financial world, as my colleague Hannes Breustedt has researched. You can read his article here: Where the next boost for defense ETFs will come from.