| 2019 |
| 12/05 | 1,267 | 1,280 | 1,267 | 1,279 | +1.35% | 74,600 | 319億9137万 | +4.41% |
| 12/04 | 1,256 | 1,267 | 1,246 | 1,262 | -0.16% | 124,000 | 315億6615万 | +3.44% |
| 12/03 | 1,261 | 1,283 | 1,260 | 1,264 | -1.4% | 80,000 | 316億1617万 | +4.03% |
| 12/02 | 1,263 | 1,286 | 1,262 | 1,282 | +1.58% | 100,000 | 320億6640万 | +5.86% |
| 11/29 | 1,256 | 1,266 | 1,255 | 1,262 | +0.4% | 56,800 | 315億6615万 | +4.73% |
| 11/28 | 1,255 | 1,265 | 1,246 | 1,257 | 0% | 73,800 | 314億4108万 | +4.75% |
| 11/27 | 1,248 | 1,259 | 1,243 | 1,257 | +1.13% | 85,500 | 314億4108万 | +5.1% |
| 11/26 | 1,246 | 1,253 | 1,239 | 1,243 | +0.24% | 78,300 | 310億9091万 | +4.37% |
| 11/25 | 1,230 | 1,241 | 1,230 | 1,240 | +0.9% | 59,900 | 310億1587万 | +4.55% |
| 11/22 | 16:30 岩井コスモ証券株式会社 人事異動に関するお知らせ |
| 11/22 | 1,212 | 1,232 | 1,209 | 1,229 | +1.49% | 84,300 | 307億4073万 | +4.06% |
| 11/21 | 1,216 | 1,219 | 1,192 | 1,211 | -0.57% | 104,400 | 302億9050万 | +2.89% |
| 11/20 | 1,215 | 1,218 | 1,205 | 1,218 | +0.25% | 59,300 | 304億6559万 | +3.84% |
| 11/19 | 1,213 | 1,219 | 1,211 | 1,215 | -0.08% | 54,800 | 303億9055万 | +3.93% |
| 11/18 | 1,208 | 1,220 | 1,203 | 1,216 | -0.16% | 53,600 | 304億1556万 | +4.47% |
| 11/15 | 1,187 | 1,219 | 1,185 | 1,218 | +2.61% | 98,200 | 304億6559万 | +5% |
| 11/14 | 1,192 | 1,198 | 1,185 | 1,187 | -0.84% | 81,400 | 296億9019万 | +2.77% |
| 11/13 | 1,207 | 1,212 | 1,196 | 1,197 | -1.48% | 94,600 | 299億4032万 | +4% |
| 11/12 | 1,215 | 1,219 | 1,201 | 1,215 | -0.65% | 92,100 | 303億9055万 | +5.93% |
| 11/11 | 1,218 | 1,232 | 1,218 | 1,223 | +0.99% | 155,200 | 305億9065万 | +7.09% |
| 11/08 | 1,210 | 1,222 | 1,208 | 1,211 | +0.5% | 111,600 | 302億9050万 | +6.32% |
| 11/07 | 1,194 | 1,207 | 1,187 | 1,205 | +0.67% | 112,900 | 301億4042万 | +6.07% |
| 11/06 | 1,198 | 1,202 | 1,192 | 1,197 | +0.42% | 123,500 | 299億4032万 | +5.74% |
| 11/05 | 13:30 岩井コスモ証券株式会社 総務省「テレワーク先駆者百選」に証券会社として初選出 |
| 11/05 | 1,172 | 1,193 | 1,172 | 1,192 | +2.41% | 110,500 | 298億1525万 | +5.67% |
| 11/01 | 1,167 | 1,172 | 1,159 | 1,164 | -1.1% | 67,900 | 291億1489万 | +3.37% |
| 10/31 | 1,158 | 1,180 | 1,156 | 1,177 | +1.2% | 182,100 | 294億4006万 | +4.72% |
| 10/30 | 1,143 | 1,166 | 1,140 | 1,163 | +1.75% | 205,600 | 290億8988万 | +3.56% |
| 10/29 | 1,150 | 1,161 | 1,143 | 1,143 | 0% | 75,300 | 285億8963万 | +1.87% |
| 10/28 | 1,144 | 1,149 | 1,132 | 1,143 | +0.44% | 58,700 | 285億8963万 | +1.78% |
| 10/25 | 15:00 2020年3月期第2四半期決算短信[日本基準](連結) |
| 10/25 | 15:00 岩井コスモ証券株式会社 人事異動に関するお知らせ |
| 10/25 | 1,152 | 1,152 | 1,112 | 1,138 | -1.04% | 100,300 | 284億6456万 | +1.43% |
| 10/24 | 1,142 | 1,159 | 1,142 | 1,150 | +0.7% | 114,700 | 287億6472万 | +2.4% |
| 10/23 | 15:00 岩井コスモ証券株式会社 インターネット取引のシステム変更に関するお知らせ |
| 10/23 | 1,130 | 1,142 | 1,121 | 1,142 | +0.97% | 83,500 | 285億6461万 | +1.6% |
| 10/21 | 1,110 | 1,133 | 1,103 | 1,131 | +1.34% | 100,700 | 282億8947万 | +0.62% |
| 10/18 | 16:30 2020年3月期第2四半期連結決算速報値に関するお知らせ |
| 10/18 | 1,123 | 1,128 | 1,114 | 1,116 | 0% | 53,600 | 279億1428万 | -0.71% |
| 10/17 | 1,122 | 1,122 | 1,110 | 1,116 | -1.33% | 78,600 | 279億1428万 | -0.71% |
| 10/16 | 1,139 | 1,145 | 1,128 | 1,131 | +0.62% | 87,600 | 282億8947万 | +0.8% |
| 10/15 | 1,110 | 1,135 | 1,110 | 1,124 | +1.72% | 114,300 | 281億1438万 | +0.36% |
| 10/11 | 1,109 | 1,110 | 1,093 | 1,105 | +0.27% | 88,900 | 276億3914万 | -1.16% |
| 10/10 | 1,100 | 1,106 | 1,087 | 1,102 | +0.09% | 65,400 | 275億6410万 | -1.25% |
| 10/09 | 1,091 | 1,106 | 1,090 | 1,101 | -0.36% | 77,200 | 275億3909万 | -1.17% |
| 10/08 | 1,093 | 1,105 | 1,090 | 1,105 | +1.47% | 75,800 | 276億3914万 | -0.63% |
| 10/07 | 1,109 | 1,109 | 1,088 | 1,089 | -0.73% | 40,700 | 272億3893万 | -2.07% |
| 10/04 | 1,094 | 1,101 | 1,088 | 1,097 | +0.27% | 70,600 | 274億3904万 | -1.26% |
| 10/03 | 1,113 | 1,113 | 1,092 | 1,094 | -3.19% | 103,300 | 273億6400万 | -1.35% |
| 10/02 | 1,130 | 1,131 | 1,122 | 1,130 | -1.14% | 64,300 | 282億6446万 | +1.99% |
| 10/01 | 1,114 | 1,149 | 1,114 | 1,143 | +2.51% | 128,200 | 285億8963万 | +3.44% |
| 09/30 | 1,100 | 1,123 | 1,095 | 1,115 | +1.27% | 149,800 | 278億8927万 | +1.18% |
| 09/27 | 1,115 | 1,118 | 1,093 | 1,101 | -2.39% | 148,000 | 275億3909万 | +0.09% |
| 09/26 | 1,129 | 1,140 | 1,123 | 1,128 | +0.27% | 276,300 | 282億1443万 | +2.64% |
| 09/25 | 1,135 | 1,135 | 1,123 | 1,125 | -1.06% | 143,500 | 281億3940万 | +2.55% |
| 09/24 | 1,150 | 1,160 | 1,136 | 1,137 | -1.13% | 181,700 | 284億3955万 | +3.84% |
| 09/20 | 16:30 2020年3月期中間配当(予定)に関するお知らせ |
| 09/20 | 1,158 | 1,158 | 1,146 | 1,150 | -0.17% | 56,300 | 287億6472万 | +5.41% |
| 09/19 | 1,135 | 1,164 | 1,135 | 1,152 | +1.23% | 119,000 | 288億1474万 | +5.98% |
| 09/18 | 1,160 | 1,160 | 1,138 | 1,138 | -1.9% | 112,400 | 284億6456万 | +5.08% |
| 09/17 | 1,150 | 1,166 | 1,134 | 1,160 | -0.26% | 118,700 | 290億1484万 | +7.31% |
| 09/13 | 1,150 | 1,166 | 1,144 | 1,163 | +1.66% | 123,300 | 290億8988万 | +7.99% |
| 09/12 | 1,152 | 1,160 | 1,143 | 1,144 | -0.09% | 108,200 | 286億1464万 | +6.52% |
| 09/11 | 1,118 | 1,145 | 1,114 | 1,145 | +3.9% | 100,500 | 286億3965万 | +6.91% |
| 09/10 | 1,079 | 1,108 | 1,077 | 1,102 | +2.7% | 98,100 | 275億6410万 | +3.18% |
| 09/09 | 1,073 | 1,081 | 1,066 | 1,073 | +0.09% | 118,100 | 268億3873万 | +0.47% |
| 09/06 | 1,078 | 1,080 | 1,070 | 1,072 | +0.09% | 78,400 | 268億1372万 | +0.28% |
| 09/05 | 1,066 | 1,076 | 1,061 | 1,071 | +1.42% | 57,400 | 267億8870万 | 0% |
| 09/04 | 1,063 | 1,063 | 1,049 | 1,056 | -0.66% | 76,500 | 264億1351万 | -1.58% |
| 09/03 | 1,053 | 1,068 | 1,053 | 1,063 | +0.66% | 45,800 | 265億8860万 | -1.21% |
| 09/02 | 1,082 | 1,082 | 1,056 | 1,056 | -3.39% | 95,000 | 264億1351万 | -2.22% |
| 08/30 | 1,068 | 1,098 | 1,068 | 1,093 | +2.63% | 69,900 | 273億3899万 | +0.83% |
| 08/29 | 1,060 | 1,065 | 1,053 | 1,065 | +0.95% | 52,500 | 266億3863万 | -2.11% |
| 08/28 | 1,068 | 1,068 | 1,053 | 1,055 | -0.75% | 55,100 | 263億8850万 | -3.48% |
| 08/27 | 1,059 | 1,074 | 1,058 | 1,063 | +1.24% | 55,600 | 265億8860万 | -3.19% |
| 08/26 | 1,051 | 1,061 | 1,046 | 1,050 | -2.69% | 81,700 | 262億6344万 | -4.81% |
| 08/23 | 1,069 | 1,079 | 1,069 | 1,079 | +1.22% | 57,900 | 269億8881万 | -2.62% |
| 08/22 | 1,076 | 1,076 | 1,065 | 1,066 | -0.56% | 36,600 | 266億6364万 | -4.05% |
| 08/21 | 1,067 | 1,077 | 1,065 | 1,072 | -0.56% | 50,500 | 268億1372万 | -3.86% |
| 08/20 | 1,066 | 1,078 | 1,060 | 1,078 | +1.7% | 33,900 | 269億6379万 | -3.75% |
| 08/19 | 1,056 | 1,070 | 1,056 | 1,060 | +0.66% | 59,600 | 265億1356万 | -5.69% |
| 08/16 | 1,041 | 1,055 | 1,038 | 1,053 | +0.67% | 40,400 | 263億3847万 | -6.73% |
| 08/15 | 1,045 | 1,050 | 1,027 | 1,046 | -1.69% | 99,600 | 261億6338万 | -7.76% |
| 08/14 | 1,074 | 1,075 | 1,058 | 1,064 | -0.19% | 57,300 | 266億1361万 | -6.67% |
| 08/13 | 1,063 | 1,070 | 1,049 | 1,066 | -0.74% | 77,700 | 266億6364万 | -6.9% |
| 08/09 | 1,080 | 1,083 | 1,066 | 1,074 | 0% | 44,400 | 268億6374万 | -6.61% |
| 08/08 | 1,071 | 1,085 | 1,064 | 1,074 | -0.09% | 64,200 | 268億6374万 | -7.09% |
| 08/07 | 1,091 | 1,094 | 1,075 | 1,075 | -1.01% | 147,000 | 268億8876万 | -7.41% |
| 08/06 | 1,052 | 1,087 | 1,048 | 1,086 | -0.18% | 78,800 | 271億6390万 | -6.86% |
| 08/05 | 1,102 | 1,106 | 1,079 | 1,088 | -1.36% | 107,800 | 272億1392万 | -7.09% |
| 08/02 | 1,101 | 1,124 | 1,101 | 1,103 | -2.22% | 98,600 | 275億8911万 | -6.05% |
| 08/01 | 1,116 | 1,135 | 1,116 | 1,128 | +1.08% | 62,200 | 282億1443万 | -4.16% |
| 07/31 | 1,133 | 1,136 | 1,116 | 1,116 | -1.67% | 102,700 | 279億1428万 | -5.26% |
| 07/30 | 1,148 | 1,156 | 1,134 | 1,135 | -1.13% | 76,300 | 283億8952万 | -3.81% |
| 07/29 | 1,169 | 1,170 | 1,145 | 1,148 | -2.05% | 73,200 | 287億1469万 | -2.79% |
| 07/26 | 16:30 2020年3月期第1四半期決算短信[日本基準](連結) |
| 07/26 | 1,180 | 1,180 | 1,167 | 1,172 | -0.68% | 38,800 | 293億1500万 | -0.85% |
| 07/25 | 1,193 | 1,195 | 1,175 | 1,180 | -0.84% | 39,000 | 295億1510万 | -0.08% |
| 07/24 | 1,193 | 1,200 | 1,190 | 1,190 | -0.08% | 49,400 | 297億6523万 | +0.76% |
| 07/23 | 1,174 | 1,194 | 1,168 | 1,191 | +1.79% | 65,200 | 297億9024万 | +1.1% |
| 07/22 | 1,181 | 1,186 | 1,169 | 1,170 | -1.18% | 48,500 | 292億6497万 | -0.51% |
| 07/19 | 16:30 2020年3月期第1四半期連結決算速報値に関するお知らせ |
| 07/19 | 1,154 | 1,184 | 1,154 | 1,184 | +3.05% | 65,200 | 296億1515万 | +0.77% |
| 07/18 | 1,175 | 1,175 | 1,148 | 1,149 | -2.46% | 99,800 | 287億3970万 | -1.96% |
| 07/17 | 1,187 | 1,187 | 1,170 | 1,178 | -0.25% | 47,200 | 294億6507万 | +0.6% |
| 07/16 | 1,181 | 1,186 | 1,172 | 1,181 | -0.42% | 42,900 | 295億4011万 | +0.94% |
| 07/12 | 1,191 | 1,197 | 1,185 | 1,186 | -0.67% | 33,500 | 296億6518万 | +1.54% |
| 07/11 | 1,183 | 1,195 | 1,181 | 1,194 | +0.93% | 44,400 | 298億6528万 | +2.49% |
| 07/10 | 1,184 | 1,188 | 1,177 | 1,183 | -0.17% | 71,600 | 295億9014万 | +1.81% |
