Cost of Saving Index
This index is a weighted average of the interest rates paid on many certificates of deposit as of the last business day of the month. Since the rates of certificates of deposit move slower than market interest rates, ARMS tied to this index are good for the consumer when interest rates are rising.
.
COSI Index for May 2008 = 3.91%
History of COSI:
|
Cost of Saving Index |
12 Month Treasury Average |
| May 2008 |
3.910% |
3.290% |
|
4.190% |
3.528% |
| |
4.430% |
3.794% |
| |
4.650% |
4.076% |
| Jan 2008 |
4.740% |
4.326% |
| |
4.790% |
4.523% |
|
4.850% |
4.662% |
| |
4.900% |
4.788% |
| |
4.880% |
4.863% |
| |
4.850% |
4.933% |
| Jul 2007 |
4.900% |
4.983% |
| |
4.900% |
5.005% |
| |
4.910% |
5.022% |
| |
4.940% |
5.029% |
| |
4.920% |
5.027% |
| |
4.910% |
5.014% |
| Jan 2007 |
4.880% |
4.983% |
|
4.850% |
4.933% |
|
4.800% |
4.883% |
|
4.740% |
4.827% |
|
4.650% |
4.758% |
|
4.540% |
4.664% |
| Jul 2006 |
4.380% |
4.563% |
|
4.240% |
4.432% |
|
4.130% |
4.282% |
|
4.010% |
4.143% |
|
3.910% |
4.011% |
|
3.820% |
3.888% |
| Jan 2006 |
3.740% |
3.751% |
|
3.640% |
3.618% |
|
3.560% |
3.478% |
|
3.490% |
3.326% |
|
3.430% |
3.163% |
|
3.340% |
3.019% |
| Jul 2005 |
3.250% |
2.865% |
|
3.150% |
2.737% |
|
3.100% |
2.633% |
|
3.030% |
2.504% |
|
2.950% |
2.347% |
|
2.870% |
2.171% |
| Jan 2005 |
2.810% |
2.022% |
|
2.080% |
1.887% |
|
2.020% |
1.773% |
|
2.000% |
1.677% |
|
1.970% |
1.595% |
|
1.940% |
1.522% |
| Jul 2004 |
1.910% |
1.463% |
|
1.880% |
1.381% |
|
1.850% |
1.288% |
|
1.850% |
1.238% |
|
1.850% |
1.225% |
|
1.850% |
1.229% |
| Jan 2004 |
1.850% |
1.234% |
|
1.850% |
1.244% |
|
1.860% |
1.256% |
|
1.870% |
1.268% |
|
1.950% |
1.302% |
|
2.030% |
1.342% |
| Jul 2003 |
2.060% |
1.379% |
|
2.120% |
1.449% |
|
2.140% |
1.548% |
|
2.170% |
1.646% |
|
2.250% |
1.747% |
|
2.300% |
1.858% |
| Jan 2003 |
2.470% |
1.935% |
|
2.560% |
2.002% |
|
2.630% |
2.066% |
|
2.740% |
2.123% |
|
2.810% |
2.180% |
|
2.850% |
2.272% |
| Jul 2002 |
2.890% |
2.414% |
|
2.920% |
2.553% |
|
2.940% |
2.668% |
|
2.980% |
2.787% |
|
3.040% |
2.912% |
|
3.150% |
3.056% |
| Jan 2002 |
3.270% |
3.260% |
|
3.390% |
3.481% |
|
3.590% |
3.763% |
|
3.890% |
4.088% |
|
4.190% |
4.395% |
|
4.390% |
4.671% |
| Jul 2001 |
4.600% |
4.897% |
|
5.030% |
5.102% |
|
5.470% |
5.318% |
|
5.210% |
5.530% |
|
5.350% |
5.711% |
|
5.470% |
5.871% |
| Jan 2001 |
5.540% |
5.999% |
|
5.520% |
6.108% |
|
5.460% |
6.128% |
|
5.370% |
6.083% |
|
5.280% |
6.035% |
|
5.250% |
5.962% |
| Jul 2000 |
5.110% |
5.880% |
|
5.030% |
5.793% |
|
4.960% |
5.703% |
|
4.840% |
5.580% |
|
4.780% |
5.458% |
|
4.750% |
5.338% |
| Jan 2000 |
4.690% |
5.212% |
|
4.640% |
5.078% |
|
4.560% |
4.968% |
|
4.500% |
4.883% |
|
4.480% |
4.773% |
|
4.470% |
4.728% |
| Jul 1999 |
4.500% |
4.729% |
|
4.520% |
4.757% |
|
4.550% |
4.783% |
|
4.580% |
4.832% |
|
4.600% |
4.889% |
|
4.630% |
4.940% |
| Jan 1999 |
4.670% |
4.991% |
|
4.790% |
5.052% |
|
4.850% |
5.136% |
|
4.910% |
5.213% |
|
4.920% |
5.325% |
|
4.950% |
5.393% |
| Jul 1998 |
4.990% |
5.422% |
|
5.010% |
5.437% |
|
5.030% |
5.460% |
|
5.020% |
5.496% |
|
5.020% |
5.547% |
|
5.040% |
5.581% |
| Jan 1998 |
5.040% |
5.599% |
|
5.040% |
5.630% |
|
5.070% |
5.625% |
|
5.080% |
5.623% |
|
5.090% |
5.629% |
|
5.100% |
5.655% |
| Jul 1997 |
5.100% |
5.664% |
|
5.070% |
5.690% |
|
5.000% |
5.700% |
|
4.980% |
5.681% |
| |
4.990% |
5.643% |
| |
5.010% |
5.605% |
| Jan 1997 |
4.980% |
5.556% |
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