An investor's emotional makeup dictates their strategy when a stock declines. You must commit to one of two paths: selling quickly to cut losses or buying more when the price is low. Trying to be both leads to poor decisions and emotional turmoil.

Following a sharp market downturn driven by trade war fears, retail investors immediately framed it as a buying opportunity. This highlights a deeply ingrained "buy the dip" mentality, suggesting retail sentiment is remarkably resilient and perhaps less reactive to macro fears than institutional money.

The best moments to buy are created by widespread fear and bad news, making you instinctively not want to. A great investor isn't someone who is unafraid during these times; they are someone who acts rationally despite the overwhelming emotional pressure to sell or stay on the sidelines.

Investors consistently overestimate their risk tolerance on questionnaires because they know the "correct" answer. However, during an actual crisis, fear feels entirely rational and justified, leading them to panic and sell despite their stated intentions.

Like a false warning in a coal mine causing a deadly stampede, the market's collective overreaction and rush for the exits is often the real source of damage, amplifying a minor shock into a major crisis. The panic itself is the poison.

The primary driver of market fluctuations is the dramatic shift in attitudes toward risk. In good times, investors become risk-tolerant and chase gains ('Risk is my friend'). In bad times, risk aversion dominates ('Get me out at any price'). This emotional pendulum causes security prices to fluctuate far more than their underlying intrinsic values.

Contrary to popular belief, the 1929 crash wasn't an instantaneous event. It took a full year for public confidence to erode and for the new reality to set in. This illustrates that markets can absorb financial shocks, but they cannot withstand a sustained, spiraling loss of confidence.

The best times to invest, like market bottoms during a crisis, often coincide with peak personal financial instability, such as job loss. This makes the common advice to "buy the dip" or "hold on" practically impossible for many, beyond just behavioral challenges.

Based on Daniel Kahneman's Prospect Theory, once investors feel they are losing money, their behavior inverts. Instead of cutting losses, they adopt a "double or nothing" mentality, chasing high-risk gambles to escape the psychological pain of loss.