The excessive reaction of the stock market this week is mainly due to most countries preparing to open up or already doing so. The sudden variant of the epidemic implies a possible reversal in the open economy, causing market panic. When the USA, United Kingdom, and Singapore announce entry bans for some African countries, it also indicates concerns about the epidemic. Personally, I believe it has not bottomed out yet. Each panic does not lead to an immediate pullback, but continues to explore the bottom until the panic ends. When will the panic end? Pfizer says it will take 2 weeks to know the effectiveness of the vaccine against the virus, so why not wait? Or is it time to bottom fish now?