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@hisnameisolllie
"This is significant because, it is only this Steem which is tradable, and thus it is this which sets the price of Steem."
Not exactly true, on Bittrex the Steem Backed Dollars are also tradeable.
Both STEEM and SBD can be bought / sold. STEEM is down while SBD is a steady.

Coin Marketplace

STEEM 0.18
TRX 0.16
JST 0.030
BTC 67633.57
ETH 2605.69
USDT 1.00
SBD 2.71