Investors have been holding unhedged US dollar assets to capture both high yields and currency appreciation, a speculative strategy traditionally used for emerging market local currency bonds. This parallel indicates a shift in risk perception, where US assets are no longer seen as a pure safe haven.

Investors extrapolating future returns from recent performance is a more damaging force in markets than underestimating fat tails or the rise of passive indexing. This behavior of 'return chasing' hurts individual investors the most and leads to poor resource allocation.

The "Liking-Loving Tendency" causes investors to identify personally with their holdings. They ignore faults, favor associated things, and distort facts to maintain positive feelings. This emotional attachment leads them to rationalize bad news and hold deteriorating assets for too long, destroying capital.

Post-mortems of bad investments reveal the cause is never a calculation error but always a psychological bias or emotional trap. Sequoia catalogs ~40 of these, including failing to separate the emotional 'thrill of the chase' from the clinical, objective assessment required for sound decision-making.

While long-term focus is a virtue, investment managers at WCM warn it can become an excuse for inaction. During periods of significant market change, blindly "sticking to your knitting" is a liability. Recognizing when to sensibly adapt versus when to stay the course is a critical and nuanced skill.

The best macro traders (Jones, Druckenmiller, Soros) are defined by their ability to discard a viewpoint the moment facts change, rather than defending it out of ego. This intellectual flexibility is crucial for survival and success, as clinging to a wrong idea is a far greater error than admitting a mistake.

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.

Bridgewater's Co-CIO argues the winning formula of the last 15 years—concentrating capital in US equities and illiquid assets—is now a dangerous trap. He believes most investors have abandoned diversification because it hasn't worked recently, creating a risky setup that calls for a globally diversified portfolio.

Howard Marks offers a crucial corollary to Einstein's famous quote. For investors, the real insanity is failing to recognize a paradigm shift. Applying strategies that worked during 40 years of falling interest rates to the current, different environment is a recipe for failure. The context determines the outcome.