Research preview

London’s native green parakeet population has surged by roughly 2700 % since the mid‑1990s, a trend that shows no sign of abating as temperatures rise. For quantitative traders, this biological boom offers a vivid illustration of how climate‑related shocks can reshape asset dynamics, prompting a reassessment of risk metrics, factor exposures, and portfolio construction. The Parakeet Phenomenon as a Natural Stress Test The parakeet story is more than an urban wildlife anecdote; it is a concrete example of a non‑linear, climate‑sensitive shock that can be quantified. A 2700 % increase over about 30 years translates to an average annual growth rate of roughly 9 % (using the rule of 70)....