Alpaca, an API-focused brokerage that operates a modern infrastructure for stocks, ETFs, and options trading and serves hundreds of financial services businesses globally, and Citadel Securities, a leading global market maker, today announced an extension of their strategic partnership in Japan to jointly leverage their expertise in brokerage infrastructure, trade execution and clearing, and recordkeeping for U.S. Stocks and Options trading. Alpaca has partnered with Citadel Securities for trade execution services since 2019, and today...