Index Industries, a real estate investment infrastructure company, completed a $50 million seed round led by Lightspeed Venture Partners with participation from Polychain Capital, Galaxy Ventures, and Wintermute Ventures. The company was co-founded by Josh Rosenthal, former president and general partner of Polychain Capital, and Brian Hardecker, CEO of residential real estate platform Longmark. Index Industries' platform combines a daily-published U.S. home price index, tokenization technology, and real estate and capital markets services to transform U.S. housing into an investable asset class. Its first product is the USHP Index, a U.S. home price benchmark index.