Goldman Sachs Group Inc. has acquired Neos Investments, a boutique firm specializing in tax-optimized exchange-traded funds. The deal highlights the growing interest in derivative-income funds that blend stock index exposure with income streams from options trading. These products have drawn regulatory scrutiny as they challenge traditional interpretations of tax laws on Wall Street. Neos has gained traction by replicating popular funds from JPMorgan Chase & Co., offering investors a mix of capital appreciation and steady income. The acquisition underscores the evolving landscape of ETFs, where tax efficiency is becoming a key differentiator. As regulators examine how these strategies comply with existing frameworks, the market awaits clarity on their long-term implications.