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.

Author Andrew Ross Sorkin wrote about 1929 because previous accounts lacked human detail. He sought to understand the characters' motivations, relationships, and incentives ("Who was sleeping with who?") to provide a richer picture of the crisis beyond purely economic data.

The rallying cry to give retail investors access to elite opportunities is not new; this same narrative fueled mass participation in the leveraged 1920s stock market bubble. Today, similar rhetoric surrounds cryptocurrency and private equity in 401(k)s, serving as a potential historical warning sign.

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.

The 1920s bubble was uniquely driven by the new concept of retail leverage. Financial institutions transported the nascent idea of buying cars on credit to the stock market, allowing individuals to buy stocks with as little as 10% down, creating unprecedented and fragile speculation.

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 feeling that today's economy is uniquely precarious is misleading. While recessions and inflation have always existed, the 24/7 news cycle creates an unprecedented intensity of negative information, leading to paralysis. The solution is to manage information consumption and focus on long-term strategy.

The trauma of the 1929 crash created a lasting aversion to stock market investing. Andrew Ross Sorkin notes his grandfather witnessed the crash as a boy and never bought a stock in his life. This shows how crises can shatter a nation's financial psyche for generations, impacting wealth creation.