Vanguard to the rescue. You can use their Find Similar Vanguard Funds
: Use this tool to find Vanguard funds similar to funds from the more than 300 fund families offered through our FundAccess® program. Choose a fund family, and then select a fund to see the list of Vanguard funds in the same asset class and category.
I used it to do MABAX
- Vanguard only had the class A shares.
You can also use Morningstar's Fund Compare Tool
Trailing Return is usually the return from the current date. For example, Morningstar uses the current day as the date to start the trailing returns from. It looks like they do Year to date return, 1 year return from today, 3 year annualized return from today, 5 year annualized return from today.
Total return is related to annualized return [and thus trailing annualized return] using this formula:
1 + Total Return = [1 + annualized return] ^ [years]
also 1 + Total Return is also called Cumulative Return.
So for VIVAX
the three year trailing annualized return is 7.40%, and the three year trailing total return would be:
1 + TR = [1 + 7.40%] ^ 
or TR = ([1 + 7.40%] ^ ) - 1