Lower interest rates and tighter spread could propel the stock much higher.From June 2021 until the start of this year, AGNC Investment (AGNC 0.49%) had seen its stock decline steadily. This year, AGNC's stock price is up a modest 5%.So why would anyone predict that this perpetual underperformer will outperform the market over the next year? Let's delve into why I think AGNC's total return will outperform the market over the next year. But first, let's also look at why it has been underperforming the market ...