If the icy, calculating Miranda Priestly from The Devil Wears Prada were managing a stock portfolio, she wouldn’t waste time on fleeting trends or hype-driven retail fads. According to a hypothetical study by eToro, her strategy would focus exclusively on brands defined by deep heritage, immense pricing power, and an untouchable reputation. By ignoring the noise of fast fashion in favor of "forever" luxury staples, this curated portfolio of industry titans would have delivered a staggering 629% return since the original film’s 2006 debut—crushing both the S&P 500 and the S&P Global Luxury Index in the process.

This "Miranda-approved" collection reads like a who’s who of high fashion, featuring powerhouses like Hermès, L’Oréal, and Christian Dior. While Hermès proved to be the ultimate standout with a massive 2,206% increase over two decades, the portfolio demonstrates that success in luxury investing requires a ruthless eye for selectivity, as some iconic names still struggle to keep pace. Ultimately, the lesson for investors is that while glamour might capture headlines, long-term durability is what drives real wealth. Just as Miranda might scoff at unoriginal ideas, the market confirms that betting on enduring prestige is far more profitable than chasing the seasonal trends of the day.