Cash+, Classic portfolios, and Premium portfolios are the three investment types available in Plenty investment accounts.
Cash+ is a low-risk money market portfolio that is primarily composed of US Treasuries. Cash+ can be used for all Goal types.
Premium portfolios use a strategy called direct indexing to invest in stocks and bonds. Direct indexing has tax-loss harvesting benefits, and allows Plenty to apply values-based investing. There's no extra fee for using a Premium portfolio, but they are only available for Joint Goals. For Plenty's disclosures on tax loss harvesting and wash sales, please see Plenty's general disclosures here.
Classic portfolios invest in stocks and bonds using ETFs and do not have tax loss harvesting nor values-based investing.