Diversification is key. Jason Koonce shares how Andrew Luck’s retirement was shocking to him and his sports card investments.

Now there’s no definitive way to determine which sets will be sought-after in the future, but what we can do is analyze trends and patterns from previous successful releases to see what we can learn.

A group that includes "Shark Tank" star Kevin O'Leary recently purchased the "holy grail of basketball collectibles," a one-of-one basketball card signed by Michael Jordan and Kobe Bryant, according ...