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Accounting for Contract Tick Values in Pairs Trading

Article Quant Q&A · Author: user13405
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Summary

The document raises a practical sizing and spread-construction question for a pairs trade involving one Brent contract and one Gasoil contract. Although the two contract prices are of a similar scale, their minimum price fluctuations have different monetary values, so equal contract counts may not represent comparable increments of risk or P&L.

It asks whether the spread should account for this tick-value difference and why. No answer, calculation, or supporting evidence is included, so the document does not establish a particular hedge ratio or method. Its useful takeaway is the issue itself: a pairs-trading spread may need to reflect each contract’s monetary tick value rather than treating one price point in each instrument as equivalent. A complete treatment would also need contract specifications and a stated objective for matching exposure.

Key ideas

  • Brent and Gasoil contracts in the example have different monetary values per minimum price move.
  • Equal contract counts do not necessarily make the two legs comparable in spread movement or P&L.
  • The document asks whether tick values should inform the spread construction but provides no answer.
  • A hedge ratio depends on the exposure being matched and the relevant contract specifications.

Tags

Pairs tradingFuturesCommoditiesRisk management
Full text
# Is it important to equalize the minimum price fluctuation in pairs trading?


# Is it important to equalize the minimum price fluctuation in pairs trading?












For example, suppose we were trading a strategy which buys one Brent contract and sells one Gasoil contract. The minimum price fluctuation for a Brent contract is \$10, and the minimum price fluctuation for Gasoil is \$25, although the contract price for each is on the same order of magnitude. I have heard that the spread should be priced to take this discrepency into consideration, but I'm not sure I see how or why.

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.