The modern M&A and advisory business exploded in the 1980s due to a confluence of factors, critically including a rule change that legalized stock buybacks. This, along with deregulation and a new focus on shareholder value, created immense demand for transaction-focused bankers to help companies manage their balance sheets.
For many large companies today, an IPO's primary purpose has shifted from raising growth capital—which is readily available in private markets—to creating liquidity for early investors and employees. The public offering acts as a valuation marker and an exit opportunity, not a funding necessity.
The infamous long-hour culture in investment banking wasn't initially a hazing ritual. It was a direct result of an unexpected explosion in business volume in the 1980s that dramatically outpaced the industry's ability to hire and train new staff, creating a genuine business need for extreme hours.
The once-distinct cultures of Wall Street firms—from 'elite' to 'scrappy'—have largely flattened. The principles of a successful culture (client service, teamwork, mentorship) are no longer proprietary, leading to a more homogenous industry identity where competitive differentiation through culture is harder to achieve.
As AI makes complex financial data and analysis a commodity for both bankers and their clients, the key differentiator will no longer be information. Bankers will have to provide value through human-centric skills: understanding psychology, navigating boardroom tactics, and providing judgment that a machine cannot replicate.
Private equity firms supplanted corporations as investment banking's most important clients because their business model requires continuous deal-making. Unlike a public company that might do a deal every few years, PE funds are structured to constantly buy and sell assets, creating a steady, high-volume pipeline for banks.
The pipeline for junior banking talent has transformed. Firms once hired smart liberal arts graduates and taught them finance from scratch. Today, candidates are expected to arrive with multiple finance internships and extensive pre-existing knowledge, effectively completing their basic training before day one.
Top-tier investment banks and law firms previously maintained strict standards, refusing clients or deal types, like hostile takeovers, they considered 'unseemly.' This culture of selectivity has largely eroded in a more competitive environment, where 'scrappy' firms proved that pursuing such business was profitable.
As technology made financial data instantly accessible, the core work of a banker evolved. It shifted from the laborious task of gathering information for clients to providing 'saturation coverage'—a continuous, consultative dialogue analyzing the now-commoditized data in the context of the client's business.