
This figure is calculated and published each year by the European Commission. If the stockpile number (from bullet point #1) is larger than the stockpile target set in legislation (from bullet point #2), then auction volume will be removed from the following year’s auction supply.

The units which were withheld from the auctions would be placed in a reserve and would not be available for market participants to access. By auctioning fewer units this would force market participants to consume units from the stockpile. The solution for oversupply that European policymakers arrived at was to auction fewer units. The five years of trading from the beginning of 2013 to the end of 2017 saw low and rangebound prices. European prices dropped away from their pre-GFC price peak above $NZ45 to a low of $NZ5 in early 2013.


The EU ETS quickly became oversupplied after the GFC because the demand for units dropped sharply as economic activity fell and the supply of units into the market was rigidly fixed. The most recent round of European carbon market reform was initiated in response to the oversupply of units that built up in the years following the Global Financial Crisis (GFC) of 2008/9. European carbon market reform: a focus on oversupply The European reform package has specifically focussed on addressing its oversupply/stockpile issues, whereas reform in New Zealand has been needed to fix a much broader range of structural issues. However, while policy reform is common to both markets, the focus of each reform package has been quite different.
#Diaper stockpile chart driver#
The strongest driver of these substantial price rallies has been policy reform in both markets.

Both markets have experienced strong and nearly identical price gains since the beginning of 2019 on the back of policy reform. For anyone who has followed New Zealand and European carbon prices over the last couple of years, it has been easy to draw parallels between them.
