ANOMALY, generally, is a deviation from the common rule. It is an irregularity that is difficult to explain using existing rules or theory. In securities, it is an unexplained or unexpected price or rate relationship that seems to offer an opportunity for an arbitrage-type profit, although not typically without risk. Examples include the tendency of small stocks to outperform large stocks, of stocks with low price-to-book value ratios to outperform stocks with high price-to-book value ratios, and of discount currency forward contracts to outperform premium currency forward contracts.
GOVERNMENT PROVISION OF DEPOSIT INSURANCE affects banks' demands for deposits and households' (and others') supply of deposits to banks. The banking industry models deposit insurance premiums that banks pay as a fixed share of deposits. As is the case for many government subsidies, the government subsidies attributable to the under-pricing of deposit insurance are likely to be shared with depositors (and bank customers more generally) because that subsidy lowers the cost of providing that insurance. In response to the subsidy, banks raise the deposit interest rates that they pay. In doing so, banks transfer some of the government subsidy to depositors.
ONE-OFF is a happening that occurs only once and is not repeated, e.g. a one-off sale is a sales event that will occur only once.
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