| 2020 |
| 01/10 | 1,319 | 1,320 | 1,300 | 1,307 | -0.46% | 67,900 | 326億9172万 | +1.55% |
| 01/09 | 1,312 | 1,321 | 1,309 | 1,313 | +1.31% | 57,700 | 328億4180万 | +2.1% |
| 01/08 | 15:30 岩井コスモ証券株式会社 第20回テレワーク推進賞において「奨励賞」を受賞 |
| 01/08 | 1,294 | 1,304 | 1,275 | 1,296 | -1.07% | 118,500 | 324億1658万 | +0.93% |
| 01/07 | 1,296 | 1,315 | 1,295 | 1,310 | +1.71% | 54,800 | 327億6676万 | +2.18% |
| 01/06 | 1,280 | 1,288 | 1,270 | 1,288 | -1.38% | 95,700 | 322億1648万 | +0.63% |
| 2019 |
| 12/30 | 1,297 | 1,320 | 1,288 | 1,306 | +1.08% | 179,700 | 326億6671万 | +2.19% |
| 12/27 | 1,270 | 1,294 | 1,269 | 1,292 | +1.73% | 83,000 | 323億1653万 | +1.25% |
| 12/26 | 1,262 | 1,271 | 1,254 | 1,270 | +1.68% | 54,300 | 317億6625万 | -0.24% |
| 12/25 | 1,272 | 1,272 | 1,249 | 1,249 | -2.12% | 83,200 | 312億4098万 | -1.73% |
| 12/24 | 1,275 | 1,283 | 1,273 | 1,276 | -0.08% | 53,700 | 319億1633万 | +0.47% |
| 12/23 | 1,287 | 1,287 | 1,270 | 1,277 | -0.7% | 56,400 | 319億4134万 | +0.79% |
| 12/20 | 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 |
| 12/20 | 1,280 | 1,286 | 1,274 | 1,286 | +0.7% | 33,000 | 321億6646万 | +1.66% |
| 12/19 | 1,289 | 1,289 | 1,276 | 1,277 | -0.93% | 65,700 | 319億4134万 | +1.19% |
| 12/18 | 1,295 | 1,295 | 1,283 | 1,289 | -0.62% | 58,600 | 322億4149万 | +2.46% |
| 12/17 | 1,300 | 1,300 | 1,292 | 1,297 | 0% | 49,000 | 324億4160万 | +3.35% |
| 12/16 | 1,285 | 1,301 | 1,285 | 1,297 | +0.93% | 86,600 | 324億4160万 | +3.68% |
| 12/13 | 1,298 | 1,302 | 1,282 | 1,285 | +0.78% | 96,500 | 321億4144万 | +2.96% |
| 12/12 | 1,284 | 1,285 | 1,268 | 1,275 | -0.7% | 87,000 | 318億9132万 | +2.33% |
| 12/11 | 1,297 | 1,297 | 1,282 | 1,284 | -1.23% | 65,200 | 321億1643万 | +3.3% |
| 12/10 | 1,296 | 1,306 | 1,296 | 1,300 | -0.08% | 46,500 | 325億1664万 | +4.92% |
| 12/09 | 1,298 | 1,305 | 1,298 | 1,301 | +0.7% | 52,900 | 325億4165万 | +5.34% |
| 12/06 | 1,273 | 1,292 | 1,271 | 1,292 | +1.02% | 88,100 | 323億1653万 | +5.13% |
| 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% |
