BANKING

RTC-Owned S&Ls; Lost $1.64 Billion: Government-controlled savings and loans lost $1.64 billion in the April-June quarter, swamping the slim profits earned by the part of the industry still privately owned, the government said. Losses at the 193 institutions controlled at the end of June by the Resolution Trust Corp. were more than four times greater than the $387-million profit recorded by the 2,216 remaining S&Ls.;