Module 6 Unit test failed

this test case is failing:
what could be the reason please help?

I verified that I have considered the condition where end date doesnot exist. Also In this module we are not required to do any modifications to calculate annualizedReturns. Thus it follow that if I have completed module 4 then I have implemented the method calculateAnnualizedReturns correctly, but still I am getting the error

As far as that test case is concerned, you must have faced that in Module 4 itself.
Regarding that test case, you may refer to this FAQ

The possible reason for the failure of that test case might be that, you didn’t make a proper implementation of it in this module.

I’m closing this topic due to no response from anyone since last 12 hours. If your query is resolved you can mark any reply as a solution. If you still have the query, please create a new topic paste the link of this topic in the description.