For most investors, the simplest portfolio strategy might also be the best, says Alpha Architect’s Wesley Gray. Here’s why. : For most investors, the optimal portfolio strategy might also be the simplest one, but don’t expect experts to recommend it, says one author and financial adviser. The reason you might never get such advice is due to a misalignment of incentives on Wall Street, according to Wesley Gray, chief executive officer at asset manager Alpha Architect and author of “DYI Finanical Advisor.” “Wall Street has a major conflict-of-interest problem because there is no great incentive to make things simple.