BANCROFT <BCF> SUES ZICO Zico INvestment Holdings INc said that Bancroft Convertible Fund Inc filed suit seeking to enjoin Zico's 30 dlr-a-share tender offer for 500,000 Bancroft shares. In its complaint, Bancroft said the tender offer materials and letters to shareholders are false and misleading and that the tender offer violates the investment company act of 1940. Zico said the suit is totally without merit and vigorously intends to contest it. A motion is scheduled to be heard on March 16.