What is SIF associated with?

Can you tell me what SIF, or Stablecoin Index Fund, is associated with? I'm curious to know if it's tied to any particular blockchain network, cryptocurrency exchange, or if it's a fund that invests in a basket of stablecoins. Additionally, I'd like to understand if SIF is regulated and what kind of risks or benefits come with investing in it. Clarifying these points would help me better understand the purpose and potential of SIF.