Actuarium

United Services Automobile Asn Grp — Private Passenger Auto

Schedule P Part 3B — net private passenger auto liability/physical damage, 1988–1997 accident years. GRCODE 2003 (United Services Automobile Asn Grp). Values in $000s, net earned premium and net losses.

Actual outcome known

Source: CAS Loss Reserve Database (Meyers & Shi), NAIC Schedule P. Meyers, G.G. and Shi, P. (2011). The Retrospective Testing of Stochastic Loss Reserve Models. CAS E-Forum, using data pulled from NAIC Schedule P Parts 1-4, 1988-1997.

Accident year1988198919901991199219931994199519961997
Net earned premium ($000)1,106,0971,195,6761,331,3171,517,4041,749,3781,964,2292,104,5562,156,6492,170,0042,187,056

Paid loss triangle, cumulative ($000), as-of 1997

AY \ Age12345678910
1988271,778530,060700,671783,609844,980870,606879,943883,870885,627886,334
1989296,828601,823780,171888,761944,970968,118976,165979,221982,148
1990334,331676,028878,584990,6781,039,0041,061,0581,070,8621,075,537
1991354,530741,578950,1301,063,4781,112,2081,131,2151,138,375
1992423,048855,5431,061,0201,157,6751,204,5101,226,650
1993484,849955,0671,171,9311,270,7401,324,732
1994541,3611,016,3281,214,9551,320,130
1995547,102986,0251,185,300
1996561,687966,162
1997542,021

Incurred loss triangle, cumulative ($000), as-of 1997

AY \ Age12345678910
19881,004,718943,338904,527903,953907,103908,622906,790900,625897,725893,764
19891,087,6411,038,9851,030,7821,019,2981,015,5351,009,769998,765994,009989,663
19901,241,1781,189,7471,166,2891,140,7821,124,0841,104,0311,092,9851,086,891
19911,333,5901,290,7931,274,9841,235,9431,189,1321,157,7151,151,469
19921,532,3361,480,7021,408,2271,303,8351,262,1381,253,181
19931,777,1641,634,2411,566,7791,391,5351,378,086
19941,892,5321,674,2981,462,7311,438,025
19951,577,6201,548,1291,417,382
19961,669,0061,418,105
19971,326,522

Realized paid-loss square, all 10 development lags ($000)

AY \ Age12345678910
1988271,778530,060700,671783,609844,980870,606879,943883,870885,627886,334
1989296,828601,823780,171888,761944,970968,118976,165979,221982,148982,763
1990334,331676,028878,584990,6781,039,0041,061,0581,070,8621,075,5371,077,4441,079,195
1991354,530741,578950,1301,063,4781,112,2081,131,2151,138,3751,142,9541,144,6581,146,042
1992423,048855,5431,061,0201,157,6751,204,5101,226,6501,237,6581,242,3771,244,2681,244,693
1993484,849955,0671,171,9311,270,7401,324,7321,350,9021,365,2081,373,8131,376,7321,377,723
1994541,3611,016,3281,214,9551,320,1301,383,5361,411,5691,424,2311,429,4021,432,0621,433,285
1995547,102986,0251,185,3001,303,8241,378,2961,410,2631,423,6181,431,6331,434,1711,435,077
1996561,687966,1621,161,5891,282,2201,352,6241,385,7131,402,0021,408,9091,412,9201,413,844
1997542,021938,5031,151,4961,274,6481,341,6781,372,2191,384,1691,391,0041,393,3021,394,268

Realized incurred-loss square, all 10 development lags ($000)

AY \ Age12345678910
19881,004,718943,338904,527903,953907,103908,622906,790900,625897,725893,764
19891,087,6411,038,9851,030,7821,019,2981,015,5351,009,769998,765994,009989,663990,425
19901,241,1781,189,7471,166,2891,140,7821,124,0841,104,0311,092,9851,086,8911,086,8591,087,971
19911,333,5901,290,7931,274,9841,235,9431,189,1321,157,7151,151,4691,152,0411,150,0301,148,829
19921,532,3361,480,7021,408,2271,303,8351,262,1381,253,1811,253,0671,251,0981,249,9931,249,668
19931,777,1641,634,2411,566,7791,391,5351,378,0861,382,9781,391,7191,393,6391,392,5491,393,273
19941,892,5321,674,2981,462,7311,438,0251,440,5681,445,2311,438,2621,437,5941,439,4591,439,464
19951,577,6201,548,1291,417,3821,419,3471,445,6931,442,9341,441,4661,442,8471,441,6071,441,046
19961,669,0061,418,1051,359,6291,388,7441,410,2761,414,5081,418,7901,418,2851,419,4521,417,426
19971,326,5221,343,9231,349,6731,390,3071,399,7451,400,3501,400,1261,402,1001,399,8781,401,626

Hindsight test: chain-ladder vs. realized outcome

A volume-weighted chain-ladder projection from the 1997 upper triangle, compared against the actual realized ultimate now that the full square is known.

Accident yearAge at 1997Projected ultimateRealized ultimateError %
198810886,334886,3340.0%
19899982,932982,7630.0%
199081,079,1021,079,195-0.0%
199171,146,6971,146,0420.1%
199261,246,1461,244,6930.1%
199351,375,0731,377,723-0.2%
199441,440,5281,433,2850.5%
199531,430,7551,435,077-0.3%
199621,455,9081,413,8443.0%
199711,568,8041,394,26812.5%
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