German police arrested a man on Friday suspected of detonating three bombs that targeted the Borussia Dortmund soccer team bus in the hope of sending the club's shares plummeting and making a profit on an investment, prosecutors said. She said the man came to the attention of investigators because he had made "suspicious options purchases" for shares in Borussia Dortmund, the only top-league German club listed on the stock exchange, on the same day as the April 11 attack. German public TV station ARD reported that put options bought just ahead of the attack were so “out of money” — for example, a put option with a strike prices that is lower than the market price of the underlying asset — that buyers must “either have been extremely inexperienced or expecting a sharp fall in prices.”

Shares of Borussia Dortmund fell 2% on the day of the attack, rose 1.75% on April 12, then dropped another 3.8% on April 13. "A significant share price drop could have been expected if a player had been seriously injured or even killed as a result of the attack," according to prosecutors, though Koehler said the precise profit W. might have expected was still being calculated. The German-Russian suspect was arrested by a German federal anti-terrorist unit in the state of Baden-Wurttemberg on Friday morning and has been charged with attempted murder, causing a bomb explosion and aggravated battery, an official press release said. The 28-year old suspect is a dual German and Russian national identified as Sergei V.

The players' bus was heading to their stadium for a Champions League match against AS Monaco on 11 April when three explosions occurred, wounding Spanish defender Marc Bartra and delaying the match by a day. He was staying at the team's L'Arrivée hotel in Dortmund on the day of the attack and had moved to a room on the top floor, overlooking the street where it took place, prosecutors say. The blast shattered the bus windows, and Spanish international Marc Bartra, 26, underwent surgery after he was hit by flying glass.
Germany arrests and charges a suspected perpetrator, 28-year-old Sergej W. The federal prosecutor says the suspect held put options on Borussia Dortmund shares.