Today's market structure, dominated by High-Frequency Trading (HFT) firms, is inherently fragile. HFTs provide liquidity during calm periods but are incentivized to withdraw it during stress, creating "liquidity voids." This amplifies price dislocations and increases systemic risk, making large-cap concentration more dangerous than it appears.

Market stability is an evolutionary process where each crisis acts as a learning event. The 2008 crash taught policymakers how to respond with tools like credit facilities, enabling a much faster, more effective response to the COVID-19 shock. Crises are not just failures but necessary reps that improve systemic resilience.

The SVB crisis wasn't a traditional bank run caused by bad loans. It was the first instance where the speed of the internet and digital fund transfers outpaced regulatory reaction, turning a manageable asset-liability mismatch into a systemic crisis. This highlights a new type of technological 'tail risk' for modern banking.

In 1929, the stock exchange ticker fell hours behind real-time trading. This information vacuum created immense uncertainty, forcing investors to physically crowd Wall Street for updates. This chaos, driven by a lack of data, contrasts sharply with today's high-speed, social-media-fueled market reactions.

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.

According to Andrew Ross Sorkin, while bad actors and speculation are always present, the single element that transforms a market downturn into a systemic financial crisis is excessive leverage. Without it, the system can absorb shocks; with it, a domino effect is inevitable, making guardrails against leverage paramount.

The city wasn't simply bad at accounting; it effectively had no centralized system. Finances were tracked on scraps of paper and in drawers, making it impossible to know the true state of its debt. This systemic failure, not just policy choices, made the collapse inevitable.

The financial system operates in a cycle of crisis and calm. After a crash, strict regulations are imposed. But the constant demand for growth and profit eventually leads to these rules being relaxed as memories fade, inevitably setting the stage for the next crisis.

Bubbles provide cover for fraudulent activities, as rising prices mask underlying problems. In cases like the South Sea Company and Railway Mania, it wasn't until after the collapse that the full extent of financial engineering, corruption, and deception came to light, by which point it was too late for most investors.