Grayscale Bitcoin Trust (GBTC)

[SilverKnightLV]

So, one share of GBTC equals how many bitcoin? Coincodex has this:
1 GBTC to BTC
0.00087667 BTC
But it fluctuates. I would expect that with a big bid/ask spread, but it's 2 cents.
And the share to BTC ratio should be stable at a specific amount.
It should be the CoinDesk XBX Index:
...shares are designed to reflect the value of BTC held by the Trust, determined by reference to the Index Price, less the Trust's expenses (1.5% annually) and other liabilities (no idea).