With an uncertain bond market and hawkish guidance from the Federal Reserve, investors should pick up the SPDR DoubleLine Total Return Tactical ETF (TOTL) - Get Report ahead of the new year, said David Mazza, head of research for SPDR ETFs and SSgA Funds. He said TOTL offers investors an actively managed portfolio that provides diversification, stability, and income at a reasonable risk. He is also positive on the SPDR Blackstone/GSO Senior Loan ETF (SRLN) - Get Report , saying investors should consider augmenting their credit allocations with senior loans, which are well positioned to benefit from an era of rising interest rates. On the equity side, he recommends the SPDR S&P Dividend ETF (SDY) - Get Report , saying investors should place a high emphasis on the quality and not quantity of yield. Finally, he is a fan of the SPDR Gold Shares (GLD) - Get Report exchange-traded fund heading into the new year as a hedge against volatility.