Liquidity eligibility as a testable system rule

A skipped technical input

Liquidity is framed as a technical input for choosing commodity futures. It is also a measurement that selection procedures often skip. Relative futures liquidity is shown as a descending visual rank in which more marks mean more activity and one or zero marks mean thin activity treated as less desirable for speculative use.

Editorial reading: thin-market participation is a failed system test, not a discretionary hesitation. A liquidity eligibility rule is a pre-trade gate that withholds a signal unless the chosen market clears a stated liquidity and execution-constraint test.

How the ranking was built

The ranking is built by multiplying contract point value, the largest price move judged conceivable from the prior three years, open interest, and a volume factor usually between 1 and 4. That largest move is the three-year price excursion, the common range input for ranking and equal-dollar sizing.

Relative contract liquidity is defined as the equal-dollar contract count times total open interest times a volume factor equal to the greater of 1 or the exponential of the natural log of volume divided by the natural log of 5000, minus 2. That volume adjustment factor lifts or floors the liquidity score when volume is unusually low or high, rather than treating every contract’s activity as interchangeable.

Equal-dollar size and effective margin

A companion column equalizes listed futures by stating how many contracts of each must be traded to match the same potential dollar excursion, using contract value times the largest price change seen in the last three years. That equal-dollar contract count is also specified as tick dollar value multiplied by the three-year maximum price excursion.

Effective percent margin is dollar margin divided by the three-year range of the contract’s dollar value, then multiplied by one hundred, so it can be compared with ordinary percent margin when allocating margin. It expresses capital locked per unit of historical range.

What the columns can say

Each column is a proportional comparison that is meaningful only against other entries in the same column. Markets at the top of the liquidity ranking are described as easiest to buy and sell and those at the bottom as most difficult.

One procedure for entries, exits, and standing aside

Editorial reading: fold relative contract liquidity, equal-dollar contract count, and effective percent margin into the same procedure that produces entries, exits, and an abstention signal. A market that fails the liquidity eligibility rule is rejected the way a failed setup is rejected. Standing aside when liquidity, margin efficiency, or contract burden fails the rule is an explicit system output, tested alongside long and short outcomes, not an after-the-fact judgment.

An equity stand-in

For equities, period volume as a percentage of shares outstanding is offered as a liquidity proxy and described as the turnover rate of those shares. That share turnover proxy is a stand-in for how completely the float is being transacted.