THERE were wild swings in the Shanghai A market last week while Shanghai B and Shenzhen markets remained generally stable. The volatile Shanghai A market ended the week with a five per cent drop on aggressive profit-taking following a 12 per cent surge on Thursday. At the end of the week, the Credit Lyonnais Shanghai A index stood at 8,851.22, 11.38 per cent down from the previous Friday's close of 9,987.92. Analysts said the Shanghai A market was still very speculative and that many investors tended to buy any stock available, regardless of its merit, when the index was up. When prices begin to fall, investors immediately sold their holdings in large quantities. Sentiment on the A market was dampened by the uncertainty over timing of announcements by listed companies of their final results. The Shanghai B market finished at 1,153.95, a scant 10.38 points lower than the previous Friday. In Shenzhen, the Credit Lyonnais A shares index finished the week at 3,239.68. The market ended on relatively low turnover of 705 million yuan. Shenzhen B shares were all but static, edging down 0.14 per cent to end the week at 1,550.75. Several B shares went untraded, and only Shenbao saw a gain, moving up 1.4 per cent to 7.45 yuan.