BSD Medical Corp. said this week that its board of directors has approved switching the listing of the Salt Lake-based company's common stock from the American Stock Exchange to the Nasdaq Stock Market.

Trading under the symbol BSDM will begin April 22.

The company also this week reported a net loss of $406,837 for the fiscal second quarter ended Feb. 29. That compares with a loss of $712,785 for the year-earlier quarter. Sales totaled $1.5 million, compared with $660,657 for the year-earlier quarter.

BSD develops medical systems used to deliver focused microwave energy for the treatment of cancer and other diseases and conditions.