Shuttle corporations need lots of cash as the shuttles they produce are very high cost.
going from 61B to bankruptcy overnight means that the corporation has spend over 160B on raw materials overnight.
this cannot be automatic.
We have seen this happening when the player manually purchased very large quantities of materials.
auto purchasing will not top 50B.
to prevent this from taking place:
1. If you plan buying raw materials manually, either move some cash to the corporation in advance or estimate ahead of time how much is needed.
2. Contract the products to the owner (country or enterprise) it will get you cash back to the corporation. Don't pile up shuttles in a corporation.
3. Check the corporation once in a couple of days to make sure it has cash.
These corporations can be very profitable but need some care.
if you have no time for it, choose different types of co