BOSTON, Aug 3 (Reuters) - Mutual fund group Franklin Resources Inc said on Wednesday it will begin offering retail clients access to hedge funds that invest in currencies, interest rates, commodities and other securities in a new so-called liquid alternatives fund. Its Franklin Templeton unit launched the Franklin K2 Global Macro Opportunities Fund this week and tapped hedge funds Aspect Capital Ltd, Emso Asset Management Ltd and Graham Capital Management to invest its assets, which currently stand at $25 million. Unlike traditional hedge funds, which can require a minimum investment of $1 million or more, liquid alternative funds are cheaper,...