bond

The photo shoots have brought granddaughter and grandmother closer - and through their special bond Ms Kaumba has learnt so much more about her Mbuya’s often difficult life.

"A key component of cooperation often involves forming emotional bonds with one another," she says.

Texting abbreviations could contribute to loneliness if people find that social bonds weaken over time because they receive less frequent or positive replies to their texts, Fang said.

“I still feel like he's lost and I want to find him. We had a bond that I can’t even explain.”

These factors collectively make equities more appealing than fixed-income investments like bonds, analysts say.