OSSIX overlap analysis compares holdings with other mutual funds to identify shared positions. Overlapping holdings can lead to unintended concentration risk in a portfolio.

OSSIX portfolio overlap matters because owning multiple funds with the same underlying stocks reduces true diversification. With 100 holdings, OSSIX may share significant positions with broad-market funds.

OSSIX overlap tool lets you enter any other mutual fund ticker and see the exact overlap percentage and shared holdings. OSSIX tax-loss harvesting finds highly correlated but non-identical funds.