Sam Stovall, CFRA Chief Investment Strategist, discusses investor optimism as attention turns to earnings season. Greg Valliere, AGF Investments Chief U.S. Policy Strategist, says Joe Biden will probably go big and prevail with his initial stimulus bill. Frances Donald, Manulife Investment Management Global Chief Economist & Global Head of Macroeconomic Strategy, says this week's jobless claims data is a tipping point. Jeff Currie, Goldman Sachs Global Head of Commodities Research, says commodities are showing signs of a structural bull market.