Today is Giving Tuesday, a global effort to increase generosity in many ways, including charitable giving. Yet, many Americans say they have reduced their giving this year as a direct result of the economy and their current financial situation, according to a new survey from Wells Fargo. CNBC’s Sharon Epperson joins ‘Squawk Box’ with more. For more on charitable giving and financial planning strategies, sign up for the free CNBC Money 101 newsletter series at cnbc.com/money101.