13点之后，A股为何突然大涨？

Group 1 - The brokerage sector experienced a significant surge after 1 PM, with the securities company index rising over 5%, marking the largest single-day gain recently [1] - Both daily and weekly charts for the brokerage sector have turned bullish, breaking through key resistance levels [1] - The brokerage sector, while not currently the market leader, serves as a barometer for market sentiment, indicating that a broader market rally is unlikely without its participation [1] Group 2 - A notable factor for the A-share market's sudden rise was the announcement of reduced tariffs on certain imported goods from 34% to 10%, which boosted market sentiment [3] - The overseas FTSE A50 index saw a significant increase, rising from 0.88% to 2.38% within 40 minutes, positively impacting both Hong Kong and A-shares [3] - The main drivers of the market rally were the brokerage and insurance sectors, which have historically attracted foreign investment and have a substantial influence on the index [3] Group 3 - Despite the surge, there are concerns about the sustainability of the rally, as the rise was primarily driven by the financial sector, with technology stocks showing little participation [4] - The market exhibited a divergence, with only 2,000 stocks rising compared to over 3,000 declining, indicating a structural division in capital allocation [4] - The index's breakthrough of 3,400 points may require consolidation before a broader consensus can lead to further upward movement, with the potential for reaching 3,500 or even 3,600 points if individual stocks align with the rally [4]