Here are two stocks with buy rank and strong income characteristics for investors to consider today, April 21:                     Tokio Marine Holdings, Inc. (TKOMY) : This insurance and financial services company witnessed the Zacks Consensus Estimate for its current year earnings increasing 17.7% the last 60 days.This Zacks Rank #1 company has a dividend yield of 2.9%, compared with the industry average of 0.7%.InterDigital, Inc. (IDCC) : This global research and development company has witnessed the Zac ...