The Federal Home Loan Bank system earned $678 million in the second quarter of 2015 and attributes the 32 percent year-over-year increase to higher gains on litigation settlements and derivatives as well as hedging activities. Total net income for the first half of the year was even higher than the previous year, according to figures compiled by the system’s Office of Finance. Net income for the first six months witnessed a 58 percent jump, to $1.69 billion. Litigation settlements accounted for $143 million in the second quarter, driven by FHLBank of Boston’s $135 million settlement. Those claims came directly from investments in non-agency mortgage-backed securities. Total FHLB assets for the first half of the year were pretty much flat at $916.9 billion, representing...