It's a short circuit breaker. See below for illustration.
Column 1 Column 2 Column 3 Column 4 0 0.105 5% 0.099 -1% 1 0.11 10% 0.098 -2% 2 0.115 15% 0.097 -3% 3 0.12 20% 0.096 -4% 4 0.125 25% 0.095 -5% 5 0.13 30% 0.094 -6% 6 0.135 35% 0.093 -7%
It will help SP rise faster when the company is going to positive direction.