Due to a misunderstanding of Roth IRA's benefits, several years back I opened a regular investment account at Vanguard (i.e. non-tax-advantaged).
Now that I understand Roth IRA, I want to open one. However, I no longer have enough money to pass the minimum buy in requirement ($3,000 for total stock index investor share, and $10,000 for total stock index admiral share).
Is it possible to transfer my assets from the regular account into the Roth IRA? Will there be any cost?