RADNOR, Pa.–(BUSINESS WIRE)–Lincoln Financial Group (NYSE: LNC) is expanding its flagship fixed indexed annuity product, Lincoln OptiBlend(R), to include the BlackRock Dynamic Allocation Index. The index’s global allocation provides investors with greater diversification in their portfolios, as well as daily volatility controls to help mitigate risk. This is particularly important to today’s savers – nearly 50% of pre-retirees are concerned about stock market volatility, and many are taking pro