"We did that out of self-preservation, in that we didn't want them to bother our allocations, " says Mr. Weiner, chief executive of RDM Financial Group Inc.

WSJ: When Clients Invest on the Side

Banks are also attractive to investors because they have the capacity to increase their dividends from the current low levels, having bolstered their cash reserves after the financial crisis, Michael Sheldon, chief market strategist at RDM Financial, said.

NPR: Stocks Rise As Lackluster Reports Ease Fed Concern