# Assets

## Portfolio assets

The assets page lets you add assets or asset classes to your portfolio,
and describe the expected distribution of those assets over time.

You can add any number of assets to your portfolio, and the table has options
for duplicating existing assets.

### Distribution

To model the change in asset prices over time, we need to describe the
expected distribution of those prices. This model supports `normal`

and
`log-normal`

asset pricing models.

In a normal pricing model, we assume that the asset price is itself normally
distributed over time.

In a log-normal pricing model, we assume that the *change* in asset prices is
log-normally distributed.

Selecting which model to use is a question of policy.

### Weights & Assigned Weight

The `assigned`

column in the asset table indicates the weight (percentage of
the total portfolio) assigned by the model to each individual asset.

If you leave the weight values in the table blank, the model will assign
equal weights to all assets.

If you enter a weight for any individual asset, the model will use that
weight for the asset and distribute the balance equally across the remaining
assets. You can enter a weight of zero for an asset, in which case it will
not be included in the portfolio.

If the total weight value is greater than 100%, the weights will be scaled down
so that the total portfolio weight is 100%.