We've probably all been there before. Someone you know felt like they may have disrespected you and they say something like "Hey broo, I was only joking...You are so sensitive!".. What do you say to this?

For example my friends and I invest...I told them about a stock I invested in which had gone down for a couple of years...Anyway they kept saying stuff like "It was a scam, bla bla bla, what a crappy stock you chose etc" Then all of a sudden it went up quite a bit and then they were like "Oh No, wE stILl hAd iT, We WeRe JusT JoKiNG! YoU ArE sO SeNsiTivE!!!!" When they were clearly wrong trying to defend themselves. How do you deal with people like these?