Even though almost all corporate entities and government
institutions now recognize the “financial risk” posed by climate change, are
weather derivatives just a way of cashing in on the said risks?
By: Ringo Bones
Back in November 20, 2012, Philippine President Benigno
Aquino has just signed into law a one billion peso (24 million US dollar)
“Survival Fund” to counteract the effects of climate change. The law often
referred to as the “Philippine Climate Change Insurance” by the local press is
meant to fund climate change adaptation projects since the Philippines is
battered, on average, about 20 typhoons a year that cause large-scale deaths
and damage to the nation’s agricultural sector says Climate Change Commission
deputy head Mary Anne Lucille Sering. It would also be used to guarantee a kind
of climate risk insurance for farmers in case of crop damage, she added.
While underwriters of the bill say it is pegged or indexed
with the ebb and flow of the Makati Stock Exchange – at least from an actuarial
perspective as a kind of “weather derivatives”. With corporate entities and
government institutions now recognize the financial risk posed by climate
change – are weather derivates, or related climate change risk insurance
policies, a sound fiscal decision to mitigate the risks of climate change – or
is this just a way for corporate entities and insurance companies to “cash in”
on the risks posed by climate change?
Contrary to popular belief, weather derivates differ from a
true-blue climate change risk insurance policy because a typical climate change
risk insurance policy generally provide protection against low probability, big
catastrophic events like hurricanes and tornadoes while weather derivatives are
more often than not used to cover more mundane weather events like a heating
oil company hedging against having a warmer-than-expected weather. By
definition, a weather derivative is a financial instrument that seems like an
insurance policy but is more like an option. Most existing weather derivatives
are based on how much the temperature goes above or below 65 degrees
Fahrenheit, but also, weather derivatives can be based on anything measurable,
like rainfall and snowfall levels.
Given that weather derivatives and its corresponding options
had been traded on the Chicago Mercantile Exchange since 1999, many see it as a
way for big companies to “cash in” on the weather related vagaries posed by
climate change – especially given that one of the early corporate pioneers in
trading weather derivatives was the “iffy” Enron Corporation through its Enron
Online unit. Whether it is a truly long-term economically viable way to insure
one’s assets against the vagaries of climate change risks is often highly
debatable at best.
Unlike your “garden-variety derivatives”, weather
derivatives don’t have a standard model in valuing it – like the Black-Scholes
formula for pricing European-style equity options and similar derivatives. This
is primarily due to the fact that the underlying asset of weather derivatives
is non-tradable which violates a number of key assumptions frequently
associated with the Black-Scholes Model. Typically, weather derivatives are
priced in a number of ways: via business pricing, historical pricing or burn
analysis, index modeling, physical models of the weather and a more superior
approach through a mixture of statistical and physical models.