The CBOE Volatility Index (VIX) experienced a significant increase, indicating heightened market fear. The VIX surged to its highest level since Halloween, marking a notable shift in market sentiment. This spike was observed on Friday, with the index moving out of its Bollinger Bands, a technical indicator suggesting a potential increase in market volatility. Throughout the week, the VIX remained a key indicator, with levels above 18 suggesting a bearish bias for the market. This shift to a 'fear mode' in the stock market is the first of its kind in the past five months, underscoring a dramatic change in investor sentiment.