经济学家和证券分析员研究提供的股市投资要诀有五个。　　要诀一：别作超短线投资。如果手上有一笔钱，但须在短期内动用，便不应拿来买股票。如果并非急用，不妨拿去作较长线投资，可能只需三至五年就有很理想的回报率。　　要诀二：分散投资减风险。不要只买一种股票，宜分? There are five tips for investing in the stock market provided by economists and securities analysts. Tip one: do not make ultra-short-term investment. If you have a sum of money on hand but you have to spend it in a short period of time, you should not buy it. If it is not urgent, we may as well take a longer term investment. It may take only three to five years to have a very good rate of return. Tip two: decentralized investment risk reduction. Do not just buy a stock, should be divided?