Gearings 1

Key Gearings 1 in
IRS refers to a predefined constant number g that multiplies the applicable fixing in Index 1 in order to produce the final rate (before the spread addition) used in calculating the floating cash flow amount.

If omitted, a flat value of 1 is assumed.
Several values may be also entered here in the form of a
If n values are provided, then the first n cash flows are paired with the provided n values in successive order.
If any cash flows are left over, they will use the last value.
Look at
IRS for the exact mathematical formula.