Bank of Boston was hit by another investigation.

The latest inquiry is being conducted by the Securities and Exchange Commission to determine whether the bank broke federal securities laws in connection with the bank’s failure to report $1.2 billion in cash transactions with Swiss banks between 1980 and 1984. The bank paid a record $500,000 in fines in that case. “We’re not terribly concerned about it,” bank spokesman Wayne Taylor said. “We feel our securities laws compliance has been exemplary.”