Sort:  

It's based on the current price of STEEM.

http://coinmarketcap.com

I'm pretty sure that's an average of all price fluctuations over a week long period. Could be wrong though, don't quote me on that. Anyone know better?

right.
It is based on the avarage price of steem over last 7 days.

Thank you for explaining...

It's due to the exchange rate changing. The estimated value you see is based on the average exchange rate over the last 7 days. It will fluctuate over time, and as Steem is still a young currency you can expect it to jump around quite a bit

So is this very similar to your estimated revenue on YouTube?

If the price goes down then your value will go down. @joshbreslauer is correct, the price evaluation is based on a 7 day average. So you can gain steem, but that won't mean you are gaining USD at the same time.

Thanks for posting this I am just getting started and was wondering why my value went down too.

Thanks for asking this question I was confused as well. How it works good to see the community is fast to act and explain.

Hello fellow steemir I just wanted only to ask about this account value what if I have $16. How to Transfer this to steem dollar? please need your help badly :( WHY i DONT HAVE ANY STEEM DOLLAR THIS IS BECAUSE i DONT HAVE ENOUGH AMOUNT RIGHT?Clipboard-1.jpg