Black Swans & Market Rotations

Have you noticed an increase of black crows in your neighborhood over the years? Apparently, the crow population has spiked 15-fold in the Bay Area the last 2 decades. That, according to the Audubon Society. The black crow has become populous and common across the country. Conversely, there's a black bird that is not so common: The black swan. They're naturally found in Australia and Tasmania. For most of history, people didn't know that black swans even existed...