Tax-loss harvesting can help mutual fund investors offset capital gains and improve post-tax returns. However, experts say investors should stay focused on asset allocation, reinvestment and long-term wealth creation while using the strategy. Tax-loss harvesting can help mutual fund investors offset capital gains and improve post-tax returns. However, experts say investors should stay focused on asset allocation, reinvestment and long-term wealth creation while using the strategy. by Soban News (international And National News)