Investor sentiments in bullish and bearish markets are fundamentally opposite, driven by optimism in bull markets and pessimism in bear markets. In a bull market, confidence is high—investors expect rising prices, leading to increased buying activity. The "fear of missing out" (FOMO) dominates, encouraging risk-taking and speculative investments. Positive economic indicators, strong corporate earnings, and low unemployment reinforce this optimism, creating a self-sustaining cycle where rising prices attract more buyers. Investors often adopt a "buy and hold" strategy, believing that upward trends will continue. Conversely, in a bear market, fear and uncertainty prevail. Investors anticipate declining prices, leading to selling pressure and reduced risk appetite. The "fear of losing more" triggers panic selling, further driving prices down. Negative news, economic recessions, or high inflation exacerbate bearish sentiment, causing investors to seek safe-haven assets like gold or bonds. Short-selling and defensive strategies become more common as traders try to profit from or protect against declines. Behavioural biases also differ—bull markets are prone to overconfidence and irrational exuberance, while bear markets amplify loss aversion and herd mentality. Ultimately, bullish sentiment fuels economic expansion, while bearish sentiment can deepen downturns, illustrating how psychology drives market cycles.