The FTSE 250 (INDEXFTSE:MCX) could offer an investment opportunity. : Since June, the FTSE 250 has declined by 18%. This means that it is almost in bear market territory, with a fall of 20% from a previous high being the technical definition of a bear market. It would be unsurprising if the index fell by a further 2% to take it to a level which is 20% down on its all-time high. With the majority of the index’s sales and profitability being generated in the UK, investors may become increasingly cautious about the outlook for the economy and the index.