Why has $BITO diverged so much from BTC's price?

The title says it all, essentially. I bought some $BITO a while back to get a little exposure to BTC in my brokerage account when I couldn't buy BTC directly. I know $BITO has paid out some decent dividends over the years, but those dividends have recently plummeted to near zero. And beyond the dividends, I have been surprised at how poorly it has tracked relative to BTC itself; I thought it would move (roughly) in tandem. Is there a way anyone can explain the divergence to this layman? Thanks.

CryptoAlerta — análise de criptomoedas e mercado em tempo real