The Colorado School Finance Project provides a brief history of Colorado's budget stabilization factor and the negative factor below:
In an effort to generate budget savings for the state, House Bill 10-1369 included a new factor called the budget stabilization factor for FY 2010-11 and FY 2011-12. For most districts, after all the funding adjustments required by the school finance act are calculated, this factor reduced total funding proportionately across districts.
Senate Bill 11-230 changed the name of this factor to the negative factor and extended its applicability indefinitely; Senate Bill 17-296 changed the name back to budget stabilization factor.
In FY 2017-18, for most districts, the budget stabilization factor reduced total funding by approximately 11 percent, or a total of $822.4 million compared to what would have been funded without the factor. Per pupil funding fell by a similar percentage, although certain districts with limited state aid did not lose as much funding.
The Colorado School Finance Project estimates that Colorado owes its school districts $7.3 billion in lost revenue since 2009. It owes Lewis-Palmer School District $50 million in lost revenue over this same period of time. According to Great Education Colorado, in 2015 Colorado spent $2,162 below the national average per pupil.