For a bit more context as to why so many investors sold their stock, Ubisoft announced the expectation to make an operating loss of between €40m and €70m for the 12 months to March 2014; compare that to their previous forecast of an operating profit of between €110m and €125m, and you have yourself a reason to sell now and repurchase when the stock reaches its lowest price. The profit warning Ubisoft gave also included a full-year revenue target of between €995m and €1.04bn, which is reduced by €400m from their previous target. With The Crew and Watch Dogs set for release after the Winter holiday season, investors are likely going to repurchase later and anticipate for the improved performance in early 2014. Currently it's at 8.19, which is down by 26.15%. I'm guessing one more euro and that's when the repurchases happen (52 week low is 6.43, but I'm guessing people won't wait for it to reach that low).

There are also reports saying Splinter Cell Blacklist and Rayman Legends underperformed by failing to reach sales expectations, so that didn't help matters. I don't know what made Blacklist fail, but I'm not surprised about Rayman Legends as every Nintendo fan warned Ubisoft that they are competing against GTA 5 back when they decided to go for a multiplatform release in September. Still to be fair, I don't know how well total sales would have worked if they stuck with being a Nintendo exclusive at its original release date (and we wouldn't have Kung Foot).