Feature: handle zero ratio in analyze allocate --rebalance

[rapidleft]

It can be convenient to set an asset class allocation ratio to 0, for example to exit a position of a certain fund or market segment.

It seems like most lak commands handle this just fine, however lak analyze allocate --rebalance does not allow this.

$ lak analyze allocate --account MyBrokerage --rebalance
<...>
AssertionError: Desired ratio of asset class MyZeroAsset cannot be zero.

I think this should work. The MyZeroAsset asset should be rebalanced to 0 and the funds moved to other assets.

A hacky work around is to set the ratio to to almost zero e.g. 0.00000000000001.

[sarvjeets]

You are right, allocate doesn't work with 0 ratio.

The issue is that the "relative" ratio doesn't work around 0 as any deviation from 0 => infinite error.

In addition to the hack mentioned above, you can also do lak whatif asset -a MyZeroAsset -$current_balance to zero out the asset before running lak analyze allocate (lak analyze allocate --account MyBrokerage --rebalance --exclude_assets MyZeroAsset). Would this be a better solution (hack)?

I do see that this is inconvenient.

[sarvjeets]

rapidleft: Not sure if you are still working on this, do you mind if I try to fix this issue?