ObamaCare: An informal term for the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010—legislation promoted by President Barack Obama that changed how health insurance functions in the U.S. ObamaCare expanded eligibility of Medicaid and required most Americans to purchase health insurance. It also set up exchanges in several states so insurers could compete to provide the most cost-effective options for consumers. Proponents believe ObamaCare makes health insurance more affordable. Critics feel it is too expensive and requires too much government involvement in the U.S. economy.

Source: The Free Dictionary

Operation Twist: the name given to a Federal Reserve tactic to flatten the yield curve of the government debt by using the Open Market Operation to buy long term debt and sell short term debt. This monetary policy operation has been used twice inU.S. history. The first time was in 1961 and the second was in 2011. In September 2011, the Fed performed Operation Twist in an effort to lower long-term interest rates. In this case, the Fed sold short-term Treasury bonds and bought long-term Treasury bonds, which pressured the long-term bond yields downward.

Sources: Investopedia, wikinvest

Overweight: The upgrading of a stock; a recommendation for investors to increase their investment position in a particular security, sector, asset class or market.

Source: Investor Dictionary.com