Shares of Super Micro Computer Inc. ($SMCI) experienced volatility as traders reacted to a significant breakout level at $46. A notable seller emerged with 300,000 shares at this price point, prompting a shift in trading strategies. Some traders transitioned from long positions to short positions after the breakout failed to sustain momentum, resulting in notable losses for some participants. One trader reported a loss of approximately 34% on the day, indicating the challenges faced in the current market environment. Meanwhile, institutional investors Qube and Arrowstreet increased their short positions in $SMCI, reflecting a bearish outlook following the recent rise in share prices. The trading activity followed a previous buy call made on November 7, which had initially seen a rebound after breaking the 200-week moving average for the first time in four years.