Today I intended to transfer some bond index funds (VCLT) that I have from the Vanguard index fund to the Vanguard Admiral Shares. My purpose behind that is so I could set up auto-investing, which you can do with mutual funds but not index funds
So I sold the bond index fund and went to purchase the Mutual fund, and found out that even though the two have the same Expense Ratio, the Mutual fund also has a 1% front load fee. I was not keen on paying that, so instead I re-purchased the same shares I had just sold, and ended up getting them for 5 dollars or so less (total) Ka-ching!