Hi Chris,
Great question! The Shrimpy application supports the ability to allocate any portfolio you desire. However, we have performed a study to see the past performance of various allocations of assets. This ranged from even distribution to highly uneven distributions. You can see the results in this article:
What we observe is that even distributions have performed the best over a 1 year period. The more uneven the distribution, the worse the portfolio performed.
Please let me know if you have any other questions!
Shrimpy Team