Rainbow bee-eater Rainbow bee-eater The rainbow bee-eater ("Merops ornatus") is a near passerine bird in the bee-eater family Meropidae. It is the only species of Meropidae found in Australia. Rainbow bee-eaters are brilliantly coloured birds that grow to be 19–24 cm (max 28 cm) in length, including the elongated tail feathers. The upper back and wings are green in colour, and the lower back and under-tail coverts are bright blue. The undersides of the wings and primary flight feathers are red and tipped with black, and the tail is black to deep violet. The rainbow bee-eater's two central tail feathers are longer
Rainbow option Rainbow option Rainbow option is a derivative exposed to two or more sources of uncertainty, as opposed to a simple option that is exposed to one source of uncertainty, such as the price of underlying asset. The name of rainbow comes from Rubinstein (1991), who emphasises that this option was based on a combination of various assets like a rainbow is a combination of various colors. More generally, rainbow options are multiasset options, also referred to as correlation options, or basket options. Rainbow can take various other forms but the combining idea is to have a payoff that is depending