On Negative Interest Rates

Photo Credit: Alcino || What is the sound of negative one hand clapping?

As with many of my articles, this one starts with a personal story from my insurance business career (skip down four paragraphs to the end of the story if you want):

25 years ago, when it was still uncommon, I wanted to go to an executive course at the Wharton School for actuaries that wanted to better understand investment math and markets.  I went to my boss at AIG (a notably tight-fisted firm on expenses) and asked if the company would pay for me to go… it was an exclusive course, and very expensive compared to any other conference that I would ever go to again in my life.  I tried not to get my hopes up.

Lo, and behold!  AIG went for it!

A month later, I was with a bunch of bright actuaries at the Wharton School.  The first thing I noticed was aside from the compound interest math, and maybe some bond knowledge, the actuaries were rather light on investment knowledge, and I would bet that all of them had passed the Society of Actuaries investment course.  The second thing I noticed were some of the odd investments described in the syllabus: it was probably my first taste of derivative instruments.  At the ripe old age of 29, I was learning a lot, and possibly more than the rest of my classmates, because I had spent a lot of time studying investments already, both on an academic and practical basis.

I had already studied the pricing of stock options in school, so I was familiar with Black-Scholes.  (Trivia note: an actuary developed the same formula for valuing optionally terminable reinsurance treaties six years ahead of Black, Scholes and Merton.  That doesn’t even take into account Bachelier, who derived it 73 years earlier, but no one knew about it, because it was written in French.)  At this point, the professor left, and a grad student came in to teach us about the pricing of bond options.  At the end of his lesson, it was time for the class to have a break.  I went down to make a comment, and it went like this:

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