热点跟踪：上市公司中报超预期全景解析

• The report introduces the concept of "Alpha of Open Gap (AOG)" to measure market recognition of earnings surprises, defined as the excess return of the stock's opening price relative to the market index after the earnings announcement day. The formula is: $A O G_{t+1}\ =O p e n_{t+1}/C l o s e_{t}-O p e n_{m k t,t+1}/C l o s e_{m k t,t}$ where $Open_{t+1}$ and $Close_{t}$ represent the stock's opening and closing prices on day $t+1$ and $t$, respectively, and $Open_{mkt,t+1}$ and $Close_{mkt,t}$ represent the market index's opening and closing prices on the same days[25][38] - The report evaluates the performance of different indices based on the proportion of companies with earnings surprises. The highest proportion is observed in the CSI 300 index constituents, with 24.41%, followed by CSI 500 (12.75%) and CSI 1000 (9.01%). Additionally, CSI 1000 constituents exhibit the largest jump in opening price after earnings announcements[26][27][28] - Sector-wise analysis shows that the financial sector has the highest proportion of companies with earnings surprises (12.70%), while the technology sector demonstrates the largest jump in opening price after earnings announcements[26][27][28] - Industry-level analysis highlights that banking, non-banking financial, and food & beverage industries have the highest proportion of companies with earnings surprises. Meanwhile, consumer services, media, and machinery industries show the largest jump in opening price after earnings announcements[29][30][33] - Among thematic indices, concepts like "Mao Index" and "Ning Combination" have the highest proportion of companies with earnings surprises. However, indices such as "Electric Power Equipment Selection Index" and "New Productive Forces Index" exhibit the largest jump in opening price after earnings announcements[31][34][33] - For ETFs, indices like "Technology Leaders" and "300 Non-Banking Financials" have the highest proportion of companies with earnings surprises. On the other hand, indices such as "Communication Equipment," "5G Communication," and "Animation & Gaming" show the largest jump in opening price after earnings announcements[32][35][33]