# Cash Flow Rules

The Windham Portfolio Advisor currently allows for eight types of cash flow rule specification. There is no limit to the number of rules within an analysis.

#### Fixed Nominal Dollar

Allows the anlayst to implement a fixed nominal dollar contribution (or disbursement) over a time horizon at a specified periodicity.

#### Fixed Real Dollar

Allows the analyst to implement a fixed inflation-adjusted dollar contribution (or disbursement) over a time horizon at a specified periodicity.

#### Constant Growth Nominal Dollar

Allows the analyst to implement a contribution (or disbursement) over a time horizon that would be a function of a specified growth rate.

#### Constant Growth Real Dollar

Allows the analyst to implement an inflation-adjusted contribution (or disbursement) over a time horizon that would be a function of a specified growth rate.

#### Constant Index Surplus

Allows the analyst to implement a nominal dollar contribution (or disbursement) indexed against a selected time series instrument over a time horizon at a given cash flow periodicity.

#### Constant Index Surplus Percentage

Allows the analyst to implement a nominal dollar contribution (or disbursement) indexed against a selected time series instrument with an offset surprlus parameter over a time horizon at a given cash flow periodicity.

#### Percent of Portfolio

Allows the analyst to implement dollar contribution (or disbursement) indexed as a percentage of the simulated portfolio value at a given cash flow periodicity. This cash flow rule is typically used by endowments and plans.

#### Smoothed Percent of Portfolio Value

Allows the analyst to implement dollar contribution (or disbursement) indexed as a percentage of the simulated portfolio value over a specified trailing moving average window, with given a cash flow periodicity. This cash flow rule is typically used by endowments and plans.<br>

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The Windham Labs team can help you generalize and add bespoke cash flow rules that are not defined above for the software platform. Please contact us for this additional service.
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