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Seasoned Returns as of December 31, 2011
For Loans Originated July 2009 - February 2011
| Prosper Rating |
Loans (#) | Loans ($) | Average Loan Amount |
Yield(1,2) | Loss Rate(1,2) | Seasoned Return(1,2) |
Weighted Average Credit Score |
| AA | 1,074 | $ 7,501,728 | $ 6,985 | 7.59% | 2.41% | 5.18% | 808 |
| A | 1,565 | $ 8,919,206 | $ 5,699 | 8.92% | 2.48% | 6.45% | 760 |
| B | 825 | $ 6,311,181 | $ 7,650 | 12.84% | 3.05% | 9.79% | 754 |
| C | 1,081 | $ 4,611,569 | $ 4,266 | 18.53% | 7.63% | 10.90% | 730 |
| D | 2,036 | $ 8,481,624 | $ 4,166 | 23.37% | 8.35% | 15.02% | 698 |
| E | 990 | $ 3,485,481 | $ 3,521 | 28.10% | 12.16% | 15.93% | 670 |
| HR | 1139 | $ 3,473,935 | $ 3,050 | 28.75% | 11.04% | 17.71% | 668 |
| Total | 8,710 | $ 42,784,724 | $ 4,912 | 16.14% | 5.69% | 10.46% | 737 |
As a Prosper investor, your return is based on the lifecycle of the underlying Notes within your portfolio. Because a Note cannot default until it's missed five payments, the return for a portfolio composed solely of young notes will be based entirely on those loans that remain current. This can result in a temporarily higher return for young portfolios than should be expected.
As your Notes age, you may see initial defaults occur between their fifth and ninth months of age. Our research shows that loan portfolios that have reached 10 months of age more accurately reflect the likely long-term performance as the loans have had sufficient time to experience the impact of potential defaults. For that reason, we provide "Seasoned Returns", defined as the Return for Notes aged 10 months or more.
Prosper's performance results have been audited by Ashland Partners LLC, an independent auditor that specializes in GIPS verification and consultation. The report confirmed Prosper's annualized seasoned rate of return, net of fees, for the period of July 1, 2009 through September 30, 2011. This is the first time an accredited, independent organization has conducted a comprehensive audit of peer-to-peer lending returns.
Loans Originated March 2011 - December 2011
Estimated Returns
| Prosper Rating |
Loans (#) | Loans ($) | Average Loan Amount |
Estimated Effective Yield(3) |
Estimated Loss Rate(3) |
Estimated Return(3) |
Weighted Average Credit Score |
| AA | 435 | $ 4,604,187 | $ 10,584 | 8.11% | 1.65% | 6.46% | 804 |
| A | 1,368 | $ 12,832,785 | $ 9,381 | 11.25% | 3.15% | 8.10% | 754 |
| B | 1,433 | $ 11,309,789 | $ 7,892 | 16.19% | 5.88% | 10.31% | 715 |
| C | 815 | $ 6,421,174 | $ 7,879 | 19.15% | 7.28% | 11.87% | 705 |
| D | 2,900 | $ 18,041,225 | $ 6,221 | 24.85% | 11.01% | 13.84% | 696 |
| E | 2,150 | $ 11,156,385 | $ 5,189 | 29.07% | 14.44% | 14.63% | 681 |
| HR | 1,103 | $ 3,814,525 | $ 3,458 | 29.33% | 17.77% | 11.56% | 683 |
| Total | 10,204 | $ 68,180,070 | $ 6,682 | 20.13% | 8.64% | 11.49% | 707 |
Loans Originated November, 2005 - June, 2009
Seasoned Returns as of December 31, 2011
| Prosper Rating(4) | Loans (#) | $ Amount Loans | Avg Loan Amt | Yield(1,5) | Loss Rate(1,5) | Return(1,5) | Weighted Average Credit Score |
| AA-B | 2,707 | $ 14,177,970 | $ 5,238 | 8.24% | 4.18% | 4.05% | 780 |
| C-E | 4,113 | $ 29,128,133 | $ 7,082 | 11.36% | 11.18% | 0.18% | 725 |
| HR | 6,903 | $ 67,672,605 | $ 9,803 | 13.52% | 23.33% | -9.82% | 705 |
| Total AA-HR | 13,723 | $ 110,978,708 | $ 8,087 | 12.29% | 17.78% | -5.48% | 720 |
| N/A*** | 15,226 | $ 67,609,614 | $ 4,440 | 15.77% | 22.20% | -6.43% | 598 |
(1) The calculations here represent historical performance data. To calculate the Yield, all payments received on borrower loans, net of principal repayment and servicing costs for such loans, are aggregated and then divided by the average daily amount of aggregate outstanding principal for such loans. This provides a gross effective yield. To calculate the Loss Rate, the net credit losses corresponding to eligible Notes are aggregated then divided by the average daily amount of aggregate outstanding principal for such loans. This provides a gross loss rate. To annualize the Yield and Rate, each is divided by the dollar-weighted average age of the portfolio in days and then multiplied by 365. These are the Yield and Loss Rate, respectively. Return is equal to the Yield minus the Loss Rate. The Yield, Loss Rate, and Return are not necessarily indicative of the future performance on any Notes.
(2) The calculations here represent historical performance data for the Borrower Payment Dependent Notes ("Notes") issued and sold by Prosper since July 15, 2009. To be included in the Seasoned Return calculations, Notes must be associated with a borrower loan originated more than 10 months ago; this calculation uses loans originated through February 28, 2011. Returns have been audited by a 3rd party for all data through September 30, 2011. All calculations were made as of December 31, 2011.
(3) The calculations here represent estimated performance data for the Borrower Payment Dependent Notes ("Notes") with a given Prosper Rating issued and sold by Prosper from March 1, 2011 through December 31, 2011.Estimated Effective Yield is equal to the borrower interest rate: (i) minus the servicing fee rate, (ii) minus estimated uncollected interest on charge-offs, (iii) plus estimated collected late fees. The Estimated Loss Rate is the estimated principal loss on charge-offs based on the historical performance of Prosper loans for borrowers with similar characteristics. Estimated Return is calculated by subtracting the Estimated Loss Rate from the Estimated Effective Yield. The calculations of Estimated Effective Yield, Estimated Loss Rate and Estimated Return require significant assumptions about the repayment of loans, and lenders should make their own judgments with respect to the accuracy of these assumptions. Actual performance may differ from estimated performance.
(4) Loans booked prior to July 2009 did not have a Prosper Rating. Where applicable, Prosper Ratings have been assigned retroactively based upon our analysis of what the rating would have been at the time of the listing. Loans that were not retroactively assigned a Prosper Rating have been designated as N/A.
(5) These calculations represent historical performance data for loans originated by Prosper from November 2005 through June 2009. All calculations were made as of December 31, 2011. The Yield, Loss Rate, and Return are not necessarily indicative of the future performance on any Notes.

