Larry Fink, the chairman and chief executive of asset-management giant BlackRock offered some timely portfolio advice in his annual letter to investors. In that letter, Fink proposed an alternative to the traditional 60/40 stock-bond portfolio,

When it comes to investing, a 50/30/20 allocation to stocks, bonds and private assets may become the "future standard portfolio," BlackRock's Larry Fink says.

BlackRock Chief Executive Officer Larry Fink is proposing a new tweak to an age-old investing formula. Instead of a traditional 60/40 split between stocks and bonds, the prominent asset manager wants everyday investors to branch out and diversify into private market assets.