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Cost of Savings Index
(GDW COSI): Historical Data
(no longer exists as an index for new mortgages)
The new index: Wachovia Cost of Savings Index (Wachovia COSI or W-COSI)
About the COSI ~ Current Value ~ Historical Data Starting from January of 1990 ~ COSI Rate Forecast
Historical performance of the Cost of Savings Index (COSI) over the last 22 years.
The Cost of Savings Index Values Starting from January of 1984
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1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 |
| January | 9.84 | 10.15 | 8.46 | 7.31 | 7.22 | 7.49 | 8.07 |
| February | 9.87 | 9.76 | 8.40 | 7.2 | 7.35 | 7.6 | 8.01 |
| March | 9.79 | 9.55 | 8.37 | 7.12 | 7.41 | 7.65 | 7.99 |
| April | 9.73 | 9.44 | 8.30 | 7.03 | 7.43 | 7.81 | 7.94 |
| May | 9.73 | 9.27 | 8.14 | 6.97 | 7.44 | 8.01 | 7.91 |
| June | 9.78 | 9.10 | 7.99 | 6.93 | 7.34 | 8.13 | 7.94 |
| July | 9.98 | 8.91 | 7.93 | 6.96 | 7.35 | 8.23 | 7.90 |
| August | 10.20 | 8.73 | 7.84 | 6.97 | 7.28 | 8.28 | 7.90 |
| September | 10.33 | 8.70 | 7.74 | 6.96 | 7.27 | 8.27 | 7.99 |
| October | 10.42 | 8.67 | 7.68 | 6.98 | 7.30 | 8.22 | 7.87 |
| November | 10.55 | 8.51 | 7.51 | 7.08 | 7.40 | 8.20 | 7.84 |
| December | 10.40 | 8.44 | 7.39 | 7.13 | 7.44 | 8.14 | 7.81 |
| The Cost of Savings Index is calculated by using the weighted annualized average rate paid by World Savings on their checking and savings accounts. Historical Data: Mortgage-X compiles historical values for the indexes which are widely used on adjustable rate mortgages (ARMs):
Mortgage Professionals Offering COSI-indexed Loans: If you are looking for a COSI-indexed ARM and need more information or advice, we invite you to take advantage of our database of the most competitive lenders available. Just complete a short loan request form and the best lenders in your local area will contact you with their rates and fees. Copyright Notice: No part of this web page may be reproduced in any form without permission in writing from the publisher. Back to Mortgage Indexes |
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