You haven't been "searching" too hard. There's lots of info on here. I've been posting monthly investment bulletins on here for the last few months.
Oh, and to clarify things a bit..... You cannot buy Banco Central CD's any more.
The banks have gotten into the CD business. They got tired of missing out on all of that money being paid directly to certificate holders, without getting their share.
Now, you have to go to a bank, and buy "shares" of a larger CD that was previously purchased by that bank.
Interest is paid every six months now.
The mature date of the CD that you're buying shares of dictates how long you wait before you get you interest payment.
So, if you buy shares of a CD that just made it's six month payment, you have to wait six months before you get your interest payment.
If you buy shares in a CD that paid it's interest 2 months before, then you have to "pay" 2 months of interest back to the bank, but then you get your full interest payment in 4 months(or whatever time frame is left on your shares till the next payment)
You don't get a paper "Certificate" any more like you used to get from Banco Central. Now, you join
Cevaldom and log in to see the status of your shares.