COE Bid-to-Quota Ratio: Calculation and Limits
Learn what bids divided by quota measures, why it is not your probability of success, and how to read it alongside the clearing premium.
The bid-to-quota ratio measures how many submitted bids there are per available certificate in a category and exercise. It is a count-based indicator of competition, not a forecast of the clearing price.
Calculate the ratio
If an exercise has 1,200 certificates and receives 1,800 bids, the ratio is 1.50. There are 1.5 bids per certificate. Compare the same category, and use the quota published for that exercise rather than assuming the first and second rounds have identical allocations.
Why it is not your chance of winning
COE allocation depends on reserve prices. With 100 certificates and 250 bids, at most 40% of the submitted bids can succeed. That does not give each bidder a 40% random chance: a bid above the eventual clearing premium has a different outcome from one below it.
Nor does a ratio close to one guarantee a low premium. For example, Category D reached $13,189 in November 2022’s first exercise with 537 bids for 441 certificates: about 1.22. The number of bids alone does not reveal how much those bidders were prepared to pay.
Read the price-setting rule
The current COE price is one dollar above the highest unsuccessful bid. Successful bidders pay the same category premium. Tied bids at the boundary can leave quota unused; a blanket statement that ties are settled by a random ballot is incorrect.
Compare changes carefully
A ratio can rise because bids increase, because quota falls, or both. Consider two hypothetical exercises: 1,500 bids for 1,000 certificates gives 1.50; 1,500 bids for 900 gives 1.67 without any additional bids. Report both counts before explaining the movement.
The ratio also does not identify buyers’ motives, distinguish every dealer commitment or reveal their full reserve-price distribution. It cannot support rules such as “above two means a $5,000 rise” without a documented predictive study.
Use it as context
Read the ratio beside the premium, quota and prior exercise, then keep your own spending limit. A higher ratio is a reason to inspect the evidence, not a reason to raise a bid beyond an affordable complete purchase.
Sources and review date
Reviewed on 13 September 2026. Historical results retain their exercise dates; worked budgets are assumptions, not quotations.