WFC - How to Use "Default Stock Price" under Configure Global Settings in Workforce Compensation?

Summary: How to Use "Default Stock Price" under Configure Global Settings in Workforce Compensation?

Content (required): We have Default Stock Price" option under Configure Global Settings in Workforce Compensation, but how to utilize this setting? I mean how to use the default value of Stock price configured at this place.

Our requirement is to update the Stock Price without refreshing the plan since Stock Price will not be known until last moment and all allocations will be done by then. There are other columns like Equity Value which depends upon the value of stock price. But need a way to handle the Stock Price without refreshing the Plan. If this particular setting will help and if yes, how to use it?