These REITs both pay lucrative monthly dividends.AGNC Investment (AGNC -0.66%) stands out among dividend stocks. The mortgage-focused real estate investment trust (REIT) currently yields more than 13%. That puts its payout 10 times higher than the S&P 500's dividend yield. The REIT pays its investors each month, enabling them to collect a very lucrative passive income stream. However, if there's one knock against AGNC Investment, it's that it doesn't increase its dividend. The total returns investors earn t ...