The Zacks Rank is known for transforming investment portfolios. In fact, a portfolio of Zacks Rank #1 (Strong Buy) stocks has beaten the market in 26 of the last 32 years, with an average annual ...

Yunjin Choi, Jonathan Taylor, Robert Tibshirani, SELECTING THE NUMBER OF PRINCIPAL COMPONENTS: ESTIMATION OF THE TRUE RANK OF A NOISY MATRIX, The Annals of Statistics, Vol. 45, No. 6 (December 2017), ...