 BOSTON--BUSINESS WIRE--Columbia Threadneedle Investments today announced the expansion of its strategic beta fixed income exchange-traded fund ETF offerings with the launch of Columbia Short Duration Bond ETF NYSE Arca: SBND, a short-duration bond strategy focused on generating income in four segments of the debt markets. SBND tracks the firms proprietary Beta Advantage Short Term Bond Index, which provides a rules-based approach to investing that is diversified and weighted toward oppo 