LONDON and RIYADH, Saudi Arabia, Sept. 28, 2026 (GLOBE NEWSWIRE) -- Virtu Financial, Inc. (NYSE: VIRT), a leading provider of global, multi-asset financial services that delivers liquidity and innovative, transparent products across the complete investment cycle to global markets, today announced the launch of POSIT® block-trading indications network for equity securities listed on the Saudi Exchange. The addition of 245 of the most liquid Saudi Exchange-listed securities to the POSIT block-trading indicati ...