BlackRock, the world's largest asset manager, has refiled its application with the US Securities and Exchange Commission (SEC) for a spot Bitcoin ETF. The new filing includes a surveillance-sharing agreement with Coinbase, one of the largest cryptocurrency exchanges in the world.

The SEC has been reluctant to approve a spot Bitcoin ETF, citing concerns about market manipulation and price volatility. However, the recent refiling by BlackRock may increase the chances of approval, as it shows that the company has taken steps to address the SEC's concerns.

The addition of Coinbase to the surveillance-sharing agreement is a significant development. Coinbase is a regulated exchange, and its participation in the agreement will help to ensure that the Bitcoin ETF is properly monitored.

The refiling by BlackRock comes at a time when cryptocurrencies are on the rise. Bitcoin has reached new all-time highs in recent months, and other cryptocurrencies have also seen significant gains. This has led to increased interest in Bitcoin ETFs, as investors look for ways to gain exposure to the cryptocurrency market.

It is still too early to say whether the SEC will approve the BlackRock Bitcoin ETF. However, the refiling is a positive development, and it increases the chances of approval. If the ETF is approved, it would be a major milestone for the cryptocurrency industry.

Here are some additional details about the refiled application:

• The ETF would be called the iShares Bitcoin Trust.
• It would track the price of Bitcoin using the CME Bitcoin Reference Rate.
• The ETF would be listed on the Nasdaq Global Select Market.
• Coinbase would provide market surveillance services for the ETF.

The SEC is expected to make a decision on the application in the coming months.