I know in theory I can claim a refund on a cork tainted wine. I also know that more often than not, I can't be bothered. Additionally I plan to cellar some of these wines for 10-20 years, which makes the exercise of seeking redress problematic. If I buy $1000 dollars of wine sealed with cork, I am mentally prepared, but annoyed at the possibility that I will lose $100. (Assuming the risk of taint is 10%).
Taking the analogy further; when you are offered a bond, which has a higher chance of default, you are rewarded with a higher yield. You are being warned and rewarded for taking a risk. The yield on Greek versus US bonds being demonstrative of this. Given the risk of default with a cork sealed wine, when will consumers be warned that the bottle is sealed with a closure prone to taint and when will they be offered a discount for taking the risk. . .
With that in mind, and with apologies to Moody's and S&P, here is my suggested rating for closures, based on my experience of their risk of failure.
- Diam AAA
- Screwcap AA+
- Vinoloc AA+
- Natural Cork BBB-
BBB- The closure has an ADEQUATE capacity to meet its hermetic commitments, but is prone to fail 5-10% of the time. The ability to seek redress depending on the motivation of both parties.


