Liquidity on these markets is called "dark pool liquidity". In crises of liquidity and solvency, central banks can provide liquidity to support illiquid banks. It involves assessing market liquidity, cash flow, and investments. Risk-averse investors naturally require higher expected return as compensation for liquidity risk. The resulting flood of market liquidity caused a rise in asset prices. These include volatility interruption, market order interruption, and liquidity interruption measures. Conventional monetary policy can be ineffective in situations such as a liquidity trap. The market liquidity of assets affects their prices and expected returns. The fund suffered from a combination of funding and asset liquidity issues. REITs have shown numerous benefits over direct investment including lower tax rates and increased liquidity. Most banks are subject to legally mandated requirements intended to help avoid a liquidity crisis. Stamp duty has the effect of discouraging speculative purchases of assets by decreasing liquidity. Advantages of mutual funds include economies of scale,economies of scope, diversification, liquidity, and professional management. The ECB decided to stop its Emergency Liquidity Assistance to Greek banks. A market with high liquidity can facilitate the privatization.