Ask the teacher to write a stock selection formula of Tongda letter with a P/B ratio of less than 2 times and a P/E ratio of less than 20 times.

P/B ratio: = c/ Finance (34);

P/E ratio: = c/finance (33);

P/B ratio < 2, P/E ratio

P/E ratio is the ratio of share price to earnings per share. The price-earnings ratio widely discussed in the market usually refers to the static price-earnings ratio, which is usually used as an indicator to compare whether stocks with different prices are overvalued or undervalued. On the one hand, investors often don't think that the profit figures calculated in strict accordance with accounting standards truly reflect the profitability of the company on the basis of going concern.

Extended data:

Tongda letter software is a multifunctional securities information platform. Compared with other market software, it has the advantages of simple interface and faster market update. Communication allows users to divide the screen freely and specify the content corresponding to each block.

As for shortcut keys, it is also one of the characteristics of Tongda letter. Another very useful function of Tongda letter is "online popularity", which can let you know which ones are currently concerned, which ones are continuously concerned and which ones are currently unpopular, so that you can more directly understand the attention of each stock.

Shenzhen Fortune Trend Technology Co., Ltd. is a high-tech enterprise in the securities industry, which is committed to the research and development of securities analysis system and computer communication system. Since the establishment of 1995, it has become an industry model after vigorous development.

The market source of its development has been adopted by many enterprises in the same industry, and it is a very mainstream enterprise with the ability to independently develop securities software in the current market. The famous brand of Shenzhen Fortune Trend Technology Co., Ltd. in the securities industry is "Tongda Letter".