The answer to the crossword puzzle is 'LIDS, ' which stands for 'Leverage Inverse Exchange Traded Funds.' These are financial instruments that allow investors to gain exposure to a wide range of assets, such as stocks, commodities, and currencies. They can be bought and sold like stocks, but they are traded on an exchange like other derivatives. They may be flipped, meaning that investors can buy and sell them quickly in order to take advantage of short-term price movements.