The key metric for LendingClub is the predicted default rate. If they are accurate, you can have good predictability of results and good returns. If not, then it's a long term problem for them. One might assume that their algorithm should improve as they get more data, and I'd love to hear from their modeling statisticians how that works, though it seems pretty close to their core IP. So I am taking it on faith a bit that they will get that part right.
My experiment was to lend $25 to 100 people. I loaned to the same rated borrowers so I did not have to deal with too much tracking. All pay 17.6% and there was a 5% predicted default rate and about 0.65% fees. Net yeild to me was predicted to be 11.95%. Fees are only paid on what is actually paid back to me.
At this time, 8 months in, I have 99 current 3 more than 31 days late 0 defaulted 0 charged off 2 repaid in full 11 sold at full price
The reason there are 115 total is that I loaned to more borrowers as payments came in.
I also put 15 up for sale on LendingClub's sister site to see how one might exit. 11 sold in a couple of days. The other 4 are still offered. Not sure why they have not sold yet, I put them up for sale last Friday.
The actual 'Net Annualized Return' as calculated by LendingCLub on my notes is 18.07%. That is expected to drop each time there is a charge-off.
I do expect some of the >31 day late to fall into charge off, but you can review the contact history between LendingClub and the borrower when LendingClub is trying to collect late payments. Checking one right now, I see that a payment is processing, so it looks like they are back on track.