Technically the stock has acted weak and looks to be able to fall further, although it is already about 9% off its early November highs. The stock marginally rallied above its 200-day moving average in early November, then quickly reversed lower. On Friday, it broke below the 50-day moving average for the first time since mid-October and is as such somewhat in freefall, Berger says.

According to Berger, the trade could also be done via the options market, where one could arguably express a bearish view with more creativity. He is looking to sell short at USD 113 or lower with a stop at USD 116. His target for the trade is USD 107.