上周五，A股、黄金走势异常，原因是什么？

Group 1 - The A-share market experienced a significant drop, with the Shanghai Composite Index falling by 39 points, nearly 1% [1] - The decline was primarily influenced by the drop in large-cap tech stocks in the US, which negatively impacted A-share tech stocks that were already weak [1] - The market's expectations for a Federal Reserve rate cut in December have diminished, with the probability of a 25 basis point cut dropping from 70% to 50%, affecting investor sentiment [1] Group 2 - The negative impact of the Federal Reserve's rate cut expectations is likely to continue in the short term, leading to a challenging environment for non-USD economies to achieve significant upward movement [2] - The market is expected to exhibit a volatile trend rather than a clear upward breakout before the end of the year [2] - Investors are advised to either refrain from trading if they do not understand the market or cautiously increase positions if they are confident in their profitability [2] Group 3 - International gold prices experienced a sharp decline, with a maximum intraday drop of 3.8% and a closing drop of 2%, indicating a significant reversal of the previous three days' gains [4] - The decrease in gold prices is attributed to the reduced expectations for a Federal Reserve rate cut in December, which negatively impacts gold as a hedge against inflation [4] - The speculative nature of the recent rise in gold prices, driven by expectations of rate cuts, has weakened, suggesting further downward potential for gold prices [5]