The difference between financing and securities lending refers to the difference between financing and securities lending. Financing difference refers to the difference between financing to buy stocks and returning financing amount. Margin difference generally refers to the difference between the number of stocks sold by margin trading and the number of returned margin trading. These two indicators are mainly used to measure the relationship between various forces in the stock market. When the financing gap increases, the trading market is more inclined to the buyer. When the margin increases, the trading market is more inclined to the seller. So the price difference before and after manipulation is the profit part. You must pay a part of the securities lending fee. If the stock price rises instead of falling after this operation, it will cost more to buy back the securities and return them to the securities company after the contract expires, thus causing losses.

1. Bid-ask spread is the price difference between the buying quotation and selling quotation of stocks, futures, options or foreign exchange in the trading order of market makers or limit orders. The bid-ask spread of a stock can measure its liquidity and transaction cost in the market [1]. Ideally, the bid-ask spread in a complete capital market is zero. The buying and selling quotation is based on the position of "financial institution". Take the exchange of foreign currency by banks as an example. The bid price or entrusted bid price is the price that the bank buys from investors (investors refer to the quotation when they want to sell). The selling price or mailing price is the price that the bank sells to investors, and investors refer to the quotation when they want to buy.

2. Short positions are opposite to long positions, which means that investors sell financial products (such as securities) without holding them. If the seller is obliged to deliver immediately, he needs to borrow assets from a third party. Investors holding short positions expect the prices of related assets to fall, so they adopt the strategy of "selling first and then buying". Broadly speaking, it also includes stock investors or traders of futures and other financial products. In the case of "holding" the position of the wealth management product, according to the fluctuation of the market price, first sell at a high level and then buy at a low level, that is, sell at a high level and suck at a low level. Shorts are also called shorts, short selling, short selling, short selling, short selling, short selling, short selling, short selling, short selling, short selling.