Calamos Investments LLC ("Calamos"), a leading alternatives manager, today announced the expansion of its Structured Protection ETF™ lineup with the July 1st launch of Calamos S&P 500® Structured Alt Protection ETF – July (CPSJ) providing 100% downside protected S&P 500 exposure over a one-year outcome period. Responding to investor demand following the successful debut of CPSM, Calamos' first Structured Protection ETFs™ launched May 1, Calamos will now list capital-protected strategies on the S