According to Mars Finance, on August 21, Greeks.live macro researcher Adam tweeted that as the Federal Reserve's Jackson Hole meeting approaches, opinions in the options market are clearly divided. Today, bullish and bearish block trades reached $1.61 billion and $1.14 billion, respectively, accounting for two-thirds of the total trading volume for the day. Trading is primarily concentrated on out-of-the-money options expiring this week and this month. Meanwhile, short-term implied volatility has declined, indicating that institutional investors are not optimistic about significant volatility resulting from this meeting.