Was just going to post this - it's due to the value of Steem having dropped so significantly over the last few days. Have you been following it at all on https://coinmarketcap.com/currencies/steem/ ? Look how much it's come down, and how low the market cap is right now compared to just a week or two ago.

Trust me, I feel your pain. I've watched one of my posts drop in value by about $120 over four days! :)