K3 for Trading

Position Limits

The Industry Standard for Calculating Position Limits

K3 is the industry standard for calculating exchange position limits.  Also full coverage of MiFID and Dodd-Frank limits. 

There are no shortcuts.

  • K3 Covers Spread Products.
  • K3 Covers Parent Child Calculations and Aggregations.
  • K3 Covers Hedge Exemptions From Regulators and Exchanges.
  • K3 Covers Diminishing Positions.
  • K3 Covers Spot Start Dates.
  • K3 Covers Option Deltas and Delta-ization.
  • K3 Covers Real Time Limit Calculations.
  • K3 Covers Brilliant Visualization.

Atlas Spot Start Data Bank

Building your own limits solution?

Atlas is the only automated source of reference data for global trading compliance reference data.

Machines, not people gather data. Which means you are always up to date and alerted for changes.

Spot Limits, Levels, Spot Start Dates, Expiration Dates, Exchange Published Deltas and other key data is all maintained in Atlas and accessible through a clean published REST API.

We Know Your Business


Did you know that all limit regimes require options to be “delta-ized.”  That means the option value is multiplied by the option delta to calculate a futures equivalent position.   

Sometimes Brokers and FCMs also calculate deltas. However, these are not the official values to use and small differences in values can have an outsized impact on positions.

K3 Limits uses the official exchange deltas published daily.


For most spread trades limits requires an adjustment to two different products, because the spread trade includes two opposing legs (one long and one short). For example, a Jun HH v Jun GD.   

But not all spread trades are for the same pricing period. Some products spread both products and months. 

It’s easy to miss, but just one thing that K3 handles seamlessly.


Did you know that the positions for some products actually diminish during the pricing period?

Sometimes it’s straightforward and linear, and sometimes it’s not. 

In other cases, the limit itself can also deprecate as products approach spot.

 K3 handles these curveballs for you.


Tired of getting outdated limits from your provider?  Tired of incorrect spot start dates?   Atlas is the only solution that feeds data directly from the exchanges.   Alerts are programmatically set to alert your team of any changes immediately.

Limits, Spot Starts, Exchange Published Deltas and key information is all maintained in Atlas’ data store and accessible through a clean published REST API.