(Bloomberg) A new Securities and Exchange Commission market-tracking database is a “massive, unprecedented government surveillance system” that could cost the financial services industry billions of dollars and compromise investors’ privacy, Citadel Securities told a US appeals court.Most Read from BloombergBiden’s Attempt to Address Memory Issue Backfires With New GaffeChina’s Property Crisis Is Starting to Ripple Across the WorldA 99% Bond Wipeout Hands Hedge Funds a Harsh Lesson on ChinaNe