MU catena di opzioni Micron Technology, Inc.
Ogni riga corrisponde a uno strike. La metà sinistra è la call, la metà destra è la put. Bid/ask sono le quotazioni attuali di acquirenti e venditori; il volume indica i contratti scambiati in questa sessione; l'open interest indica i contratti aperti. La riga evidenziata è quella più vicina al prezzo del titolo.
Questa scadenza prezza una mossa di circa ±11.8% (796.59–1,009.39) · ATM IV 50.5% · P/C open interest 0.98
| CALL | Strike | PUT | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bid | Chiedi | Vol | OIThe number of option contracts currently outstanding at a strike or expiration. High open interest shows where positions are concentrated. | IV | ΔModel sensitivity of an option's price to a $1 move in the stock; also used as a rough moneyness scale (a 25-delta option is well out of the money). | Γ | Θ | Bid | Chiedi | Vol | OI | IV | Δ | Γ | Θ | |
| 439.20 | 451.95 | 382 | 97.7% | 0.99 | 0.0001 | -0.010 | 460 | 0.4700 | 0.6000 | 874 | 98.2% | -0.01 | 0.0001 | -0.065 | ||
| 429.25 | 442.00 | 210 | 95.0% | 0.99 | 0.0001 | -0.016 | 470 | 0.5200 | 0.6200 | 330 | 96.1% | -0.01 | 0.0001 | -0.070 | ||
| 419.45 | 431.60 | 1 | 289 | 88.8% | 0.99 | 0.0001 | -0.022 | 480 | 0.5900 | 0.6700 | 16 | 597 | 94.5% | -0.01 | 0.0001 | -0.075 |
| 409.80 | 421.55 | 1 | 319 | 88.7% | 0.99 | 0.0001 | -0.029 | 490 | 0.6500 | 0.7000 | 3 | 652 | 92.5% | -0.01 | 0.0001 | -0.080 |
| 400.45 | 410.95 | 1,121 | 85.7% | 0.99 | 0.0001 | -0.035 | 500 | 0.6900 | 0.7600 | 145 | 3,577 | 90.6% | -0.01 | 0.0001 | -0.085 | |
| 389.65 | 402.40 | 174 | 88.2% | 0.99 | 0.0001 | -0.042 | 510 | 0.7300 | 0.8600 | 246 | 88.9% | -0.01 | 0.0001 | -0.091 | ||
| 379.75 | 392.50 | 220 | 86.4% | 0.99 | 0.0001 | -0.049 | 520 | 0.8100 | 0.8900 | 20 | 1,606 | 87.0% | -0.01 | 0.0001 | -0.097 | |
| 369.85 | 382.65 | 306 | 84.9% | 0.99 | 0.0001 | -0.057 | 530 | 0.9000 | 0.9500 | 7 | 610 | 85.3% | -0.01 | 0.0001 | -0.103 | |
| 359.95 | 372.75 | 306 | 82.9% | 0.99 | 0.0001 | -0.065 | 540 | 0.9500 | 1.07 | 1,441 | 83.7% | -0.01 | 0.0001 | -0.110 | ||
| 350.10 | 362.90 | 238 | 81.6% | 0.99 | 0.0002 | -0.073 | 550 | 1.06 | 1.11 | 304 | 1,720 | 81.9% | -0.01 | 0.0002 | -0.117 | |
| 340.20 | 353.00 | 218 | 79.6% | 0.98 | 0.0002 | -0.081 | 560 | 1.15 | 1.21 | 1 | 391 | 80.2% | -0.02 | 0.0002 | -0.124 | |
| 331.75 | 341.75 | 1,202 | 78.0% | 0.98 | 0.0002 | -0.090 | 570 | 1.25 | 1.31 | 177 | 3,619 | 78.6% | -0.02 | 0.0002 | -0.132 | |
| 320.50 | 333.30 | 117 | 76.4% | 0.98 | 0.0002 | -0.099 | 580 | 1.37 | 1.43 | 8 | 1,227 | 77.0% | -0.02 | 0.0002 | -0.140 | |
| 310.45 | 323.50 | 368 | 74.2% | 0.98 | 0.0002 | -0.109 | 590 | 1.49 | 1.55 | 2 | 584 | 75.4% | -0.02 | 0.0002 | -0.148 | |
| 300.90 | 313.75 | 644 | 74.0% | 0.98 | 0.0003 | -0.120 | 600 | 1.60 | 1.69 | 117 | 3,358 | 73.8% | -0.02 | 0.0003 | -0.158 | |
| 291.20 | 303.90 | 156 | 72.7% | 0.98 | 0.0003 | -0.131 | 610 | 1.77 | 1.83 | 60 | 907 | 72.3% | -0.02 | 0.0003 | -0.168 | |
| 281.85 | 294.10 | 361 | 72.5% | 0.97 | 0.0003 | -0.142 | 620 | 1.92 | 2.00 | 96 | 1,852 | 70.8% | -0.03 | 0.0003 | -0.178 | |
| 271.80 | 284.30 | 193 | 70.1% | 0.97 | 0.0004 | -0.155 | 630 | 2.12 | 2.25 | 4 | 1,112 | 69.5% | -0.03 | 0.0004 | -0.190 | |
| 262.20 | 274.55 | 301 | 69.0% | 0.97 | 0.0004 | -0.169 | 640 | 2.33 | 2.42 | 867 | 1,726 | 68.0% | -0.03 | 0.0004 | -0.202 | |
| 252.95 | 264.85 | 743 | 68.7% | 0.96 | 0.0004 | -0.183 | 650 | 2.53 | 2.66 | 92 | 3,196 | 66.6% | -0.04 | 0.0004 | -0.215 | |
| 242.55 | 255.15 | 309 | 65.6% | 0.96 | 0.0005 | -0.199 | 660 | 2.85 | 2.98 | 165 | 1,250 | 65.5% | -0.04 | 0.0005 | -0.230 | |
| 234.25 | 240.75 | 272 | 55.9% | 0.96 | 0.0006 | -0.216 | 670 | 3.15 | 3.25 | 127 | 820 | 64.1% | -0.04 | 0.0006 | -0.245 | |
| 228.60 | 230.95 | 1 | 151 | 63.7% | 0.95 | 0.0006 | -0.234 | 680 | 3.45 | 3.65 | 240 | 1,235 | 62.8% | -0.05 | 0.0006 | -0.263 |
| 217.30 | 221.50 | 4 | 59.6% | 0.95 | 0.0007 | -0.254 | 690 | 3.95 | 4.05 | 339 | 827 | 61.8% | -0.05 | 0.0007 | -0.282 | |
| 209.70 | 211.60 | 7 | 964 | 61.1% | 0.94 | 0.0008 | -0.276 | 700 | 4.40 | 4.50 | 627 | 3,991 | 60.6% | -0.06 | 0.0008 | -0.303 |
| 200.25 | 201.90 | 324 | 59.5% | 0.93 | 0.0008 | -0.299 | 710 | 4.95 | 5.05 | 159 | 477 | 59.6% | -0.07 | 0.0008 | -0.325 | |
| 190.95 | 192.55 | 204 | 58.6% | 0.92 | 0.0009 | -0.325 | 720 | 5.55 | 5.65 | 113 | 1,019 | 58.6% | -0.08 | 0.0009 | -0.349 | |
| 182.00 | 183.55 | 2 | 378 | 58.3% | 0.91 | 0.0010 | -0.352 | 730 | 6.30 | 6.40 | 80 | 683 | 57.7% | -0.09 | 0.0010 | -0.376 |
| 172.60 | 175.05 | 5 | 344 | 57.8% | 0.90 | 0.0011 | -0.382 | 740 | 7.10 | 7.20 | 162 | 2,050 | 56.7% | -0.10 | 0.0011 | -0.404 |
| 164.00 | 164.65 | 4 | 416 | 55.9% | 0.89 | 0.0012 | -0.413 | 750 | 8.05 | 8.20 | 168 | 8,326 | 56.0% | -0.11 | 0.0013 | -0.435 |
| 155.10 | 155.75 | 6 | 523 | 55.1% | 0.88 | 0.0014 | -0.446 | 760 | 9.15 | 9.30 | 107 | 1,105 | 55.2% | -0.12 | 0.0014 | -0.467 |
| 146.50 | 147.05 | 1 | 388 | 54.5% | 0.87 | 0.0015 | -0.480 | 770 | 10.40 | 10.55 | 64 | 664 | 54.5% | -0.14 | 0.0015 | -0.500 |
| 138.00 | 138.55 | 3 | 365 | 53.9% | 0.85 | 0.0016 | -0.516 | 780 | 11.85 | 12.05 | 109 | 1,637 | 54.0% | -0.15 | 0.0016 | -0.535 |
| 129.65 | 130.25 | 9 | 236 | 53.4% | 0.83 | 0.0018 | -0.553 | 790 | 13.55 | 13.70 | 217 | 1,141 | 53.4% | -0.17 | 0.0018 | -0.571 |
| 121.65 | 122.15 | 36 | 1,743 | 52.9% | 0.81 | 0.0019 | -0.589 | 800 | 15.40 | 15.60 | 1,175 | 7,319 | 53.0% | -0.19 | 0.0019 | -0.607 |
| 113.85 | 114.35 | 25 | 815 | 52.6% | 0.79 | 0.0021 | -0.626 | 810 | 17.55 | 17.75 | 159 | 2,927 | 52.6% | -0.21 | 0.0021 | -0.642 |
| 106.25 | 106.75 | 23 | 724 | 52.2% | 0.77 | 0.0022 | -0.662 | 820 | 19.95 | 20.20 | 585 | 2,571 | 52.3% | -0.23 | 0.0022 | -0.677 |
| 99.00 | 99.50 | 3 | 559 | 51.9% | 0.74 | 0.0023 | -0.696 | 830 | 22.65 | 22.85 | 111 | 1,510 | 51.9% | -0.26 | 0.0024 | -0.711 |
| 91.95 | 92.45 | 43 | 493 | 51.6% | 0.72 | 0.0025 | -0.728 | 840 | 25.60 | 25.85 | 143 | 1,702 | 51.7% | -0.28 | 0.0025 | -0.742 |
| 88.55 | 89.05 | 17 | 17 | 51.5% | 0.71 | 0.0025 | -0.743 | 845 | 27.20 | 27.45 | 88 | 168 | 51.6% | -0.30 | 0.0026 | -0.757 |
| 85.25 | 85.75 | 165 | 797 | 51.4% | 0.69 | 0.0026 | -0.757 | 850 | 28.85 | 29.10 | 324 | 7,140 | 51.4% | -0.31 | 0.0026 | -0.771 |
| 82.00 | 82.50 | 23 | 14 | 51.3% | 0.68 | 0.0026 | -0.771 | 855 | 30.60 | 30.85 | 26 | 30 | 51.3% | -0.32 | 0.0027 | -0.784 |
| 78.85 | 79.30 | 19 | 540 | 51.2% | 0.67 | 0.0027 | -0.783 | 860 | 32.45 | 32.70 | 81 | 1,926 | 51.3% | -0.34 | 0.0027 | -0.796 |
| 75.70 | 76.20 | 18 | 2 | 51.1% | 0.65 | 0.0027 | -0.795 | 865 | 34.30 | 34.60 | 48 | 20 | 51.1% | -0.35 | 0.0028 | -0.807 |
| 72.75 | 73.15 | 52 | 483 | 51.0% | 0.64 | 0.0028 | -0.806 | 870 | 36.30 | 36.55 | 252 | 1,669 | 51.1% | -0.36 | 0.0028 | -0.818 |
| 69.80 | 70.25 | 11 | 4 | 50.9% | 0.62 | 0.0028 | -0.815 | 875 | 38.35 | 38.65 | 61 | 19 | 51.0% | -0.38 | 0.0028 | -0.827 |
| 66.95 | 67.35 | 119 | 645 | 50.8% | 0.61 | 0.0029 | -0.824 | 880 | 40.45 | 40.75 | 106 | 3,881 | 50.8% | -0.39 | 0.0029 | -0.835 |
| 64.15 | 64.55 | 84 | 5 | 50.7% | 0.59 | 0.0029 | -0.831 | 885 | 42.65 | 43.00 | 8 | 18 | 50.8% | -0.41 | 0.0029 | -0.842 |
| 61.45 | 61.85 | 783 | 403 | 50.7% | 0.58 | 0.0029 | -0.837 | 890 | 44.95 | 45.25 | 83 | 2,063 | 50.7% | -0.42 | 0.0030 | -0.848 |
| 58.80 | 59.20 | 96 | 8 | 50.6% | 0.57 | 0.0029 | -0.842 | 895 | 47.30 | 47.65 | 58 | 72 | 50.6% | -0.44 | 0.0030 | -0.853 |
| 56.25 | 56.65 | 272 | 4,445 | 50.5% | 0.55 | 0.0030 | -0.846 | 900 | 49.75 | 50.10 | 1,107 | 6,297 | 50.6% | -0.45 | 0.0030 | -0.856 |
| 53.80 | 54.15 | 515 | 37 | 50.5% | 0.54 | 0.0030 | -0.849 | 905 | 52.25 | 52.60 | 128 | 104 | 50.5% | -0.47 | 0.0030 | -0.858 |
| 51.40 | 51.75 | 348 | 7,173 | 50.4% | 0.52 | 0.0030 | -0.850 | 910 | 54.85 | 55.20 | 219 | 1,806 | 50.4% | -0.48 | 0.0030 | -0.859 |
| 49.05 | 49.40 | 114 | 89 | 50.3% | 0.51 | 0.0030 | -0.850 | 915 | 57.50 | 57.90 | 135 | 38 | 50.4% | -0.50 | 0.0030 | -0.859 |
| 46.80 | 47.15 | 400 | 1,020 | 50.3% | 0.49 | 0.0030 | -0.849 | 920 | 60.25 | 60.65 | 71 | 2,408 | 50.3% | -0.51 | 0.0030 | -0.858 |
| 44.65 | 45.00 | 82 | 75 | 50.2% | 0.48 | 0.0030 | -0.847 | 925 | 63.05 | 63.45 | 124 | 152 | 50.3% | -0.53 | 0.0030 | -0.855 |
| 42.50 | 42.85 | 339 | 913 | 50.1% | 0.46 | 0.0030 | -0.844 | 930 | 65.95 | 66.35 | 57 | 2,225 | 50.2% | -0.54 | 0.0030 | -0.852 |
| 40.50 | 40.80 | 134 | 66 | 50.1% | 0.45 | 0.0030 | -0.839 | 935 | 68.90 | 69.35 | 18 | 8 | 50.2% | -0.56 | 0.0030 | -0.847 |
| 38.55 | 38.85 | 133 | 1,468 | 50.0% | 0.43 | 0.0030 | -0.833 | 940 | 71.90 | 72.35 | 78 | 1,330 | 50.1% | -0.57 | 0.0030 | -0.841 |
| 34.85 | 35.15 | 341 | 2,893 | 49.9% | 0.40 | 0.0029 | -0.819 | 950 | 78.20 | 78.70 | 414 | 3,578 | 50.0% | -0.60 | 0.0030 | -0.826 |
| 31.40 | 31.70 | 65 | 707 | 49.8% | 0.38 | 0.0029 | -0.801 | 960 | 84.80 | 85.30 | 73 | 1,073 | 49.9% | -0.63 | 0.0029 | -0.808 |
| 28.25 | 28.55 | 89 | 692 | 49.8% | 0.35 | 0.0028 | -0.779 | 970 | 91.65 | 92.15 | 38 | 929 | 49.8% | -0.66 | 0.0029 | -0.786 |
| 25.40 | 25.65 | 186 | 7,489 | 49.7% | 0.32 | 0.0027 | -0.755 | 980 | 98.75 | 99.30 | 25 | 1,514 | 49.7% | -0.68 | 0.0028 | -0.761 |
| 22.75 | 23.00 | 88 | 656 | 49.6% | 0.30 | 0.0026 | -0.728 | 990 | 106.15 | 106.70 | 36 | 858 | 49.7% | -0.71 | 0.0027 | -0.734 |
| 20.35 | 20.60 | 1,423 | 5,722 | 49.6% | 0.28 | 0.0025 | -0.699 | 1,000 | 113.80 | 114.35 | 69 | 3,348 | 49.7% | -0.73 | 0.0026 | -0.705 |
| 18.20 | 18.40 | 228 | 1,274 | 49.6% | 0.25 | 0.0024 | -0.669 | 1,010 | 121.65 | 122.20 | 31 | 787 | 49.7% | -0.76 | 0.0025 | -0.675 |
| 16.25 | 16.45 | 135 | 1,391 | 49.6% | 0.23 | 0.0023 | -0.638 | 1,020 | 129.75 | 130.40 | 38 | 1,569 | 49.7% | -0.78 | 0.0024 | -0.644 |
| 14.50 | 14.70 | 228 | 1,187 | 49.7% | 0.21 | 0.0022 | -0.607 | 1,030 | 138.00 | 138.60 | 6 | 549 | 49.7% | -0.80 | 0.0023 | -0.612 |
| 13.00 | 13.10 | 1,376 | 1,835 | 49.8% | 0.19 | 0.0021 | -0.575 | 1,040 | 146.50 | 147.15 | 4 | 723 | 49.9% | -0.82 | 0.0022 | -0.580 |
| 11.55 | 11.70 | 575 | 8,780 | 49.9% | 0.18 | 0.0020 | -0.545 | 1,050 | 155.15 | 155.80 | 27 | 1,463 | 49.9% | -0.83 | 0.0020 | -0.549 |
| 10.30 | 10.50 | 433 | 1,337 | 50.0% | 0.16 | 0.0018 | -0.514 | 1,060 | 163.95 | 164.65 | 9 | 554 | 50.1% | -0.85 | 0.0019 | -0.518 |
| 9.25 | 9.40 | 202 | 1,301 | 50.2% | 0.15 | 0.0017 | -0.485 | 1,070 | 172.95 | 173.60 | 8 | 753 | 50.3% | -0.86 | 0.0018 | -0.488 |
| 8.30 | 8.45 | 122 | 859 | 50.5% | 0.13 | 0.0016 | -0.458 | 1,080 | 182.05 | 182.70 | 18 | 425 | 50.5% | -0.88 | 0.0017 | -0.459 |
| 7.45 | 7.60 | 134 | 1,239 | 50.7% | 0.12 | 0.0015 | -0.431 | 1,090 | 191.25 | 192.00 | 1 | 285 | 50.8% | -0.89 | 0.0016 | -0.433 |
| 6.70 | 6.85 | 734 | 5,365 | 51.0% | 0.11 | 0.0014 | -0.406 | 1,100 | 198.10 | 203.65 | 19 | 869 | 50.9% | -0.90 | 0.0015 | -0.407 |
| 6.05 | 6.20 | 120 | 925 | 51.3% | 0.10 | 0.0013 | -0.382 | 1,110 | 209.10 | 211.95 | 2 | 101 | 51.9% | -0.91 | 0.0014 | -0.382 |
| 5.50 | 5.60 | 104 | 1,937 | 51.7% | 0.09 | 0.0012 | -0.360 | 1,120 | 218.95 | 220.45 | 1 | 97 | 51.3% | -0.92 | 0.0013 | -0.360 |
| 4.95 | 5.10 | 128 | 671 | 52.0% | 0.09 | 0.0011 | -0.339 | 1,130 | 227.25 | 231.20 | 147 | 51.6% | -0.93 | 0.0012 | -0.340 | |
| 4.50 | 4.65 | 161 | 1,478 | 52.4% | 0.08 | 0.0011 | -0.320 | 1,140 | 237.50 | 242.65 | 1 | 81 | 55.5% | -0.94 | 0.0012 | -0.323 |
| 4.15 | 4.25 | 326 | 9,168 | 52.9% | 0.07 | 0.0010 | -0.302 | 1,150 | 247.80 | 250.70 | 2 | 318 | 54.7% | -0.94 | 0.0011 | -0.304 |
| 3.75 | 3.85 | 143 | 992 | 53.2% | 0.07 | 0.0009 | -0.285 | 1,160 | 256.65 | 260.50 | 90 | 53.9% | -0.95 | 0.0010 | -0.287 | |
| 3.45 | 3.55 | 67 | 555 | 53.7% | 0.06 | 0.0009 | -0.270 | 1,170 | 266.10 | 268.95 | 40 | 50.5% | -0.96 | 0.0010 | -0.270 | |
| 3.20 | 3.30 | 128 | 613 | 54.3% | 0.06 | 0.0008 | -0.256 | 1,180 | 276.90 | 280.65 | 1 | 79 | 57.5% | -0.96 | 0.0009 | -0.258 |
| 2.95 | 3.05 | 84 | 1,320 | 54.8% | 0.05 | 0.0008 | -0.243 | 1,190 | 286.80 | 288.95 | 96 | 55.1% | -0.97 | 0.0008 | -0.249 | |
| 2.70 | 2.79 | 2,018 | 5,721 | 55.1% | 0.05 | 0.0007 | -0.231 | 1,200 | 295.25 | 300.15 | 16 | 490 | 55.4% | -0.97 | 0.0008 | -0.240 |
| 2.48 | 2.60 | 70 | 1,261 | 55.6% | 0.05 | 0.0006 | -0.219 | 1,210 | 301.15 | 312.00 | 131 | -0.97 | 0.0008 | -0.226 | ||
| 2.30 | 2.40 | 76 | 722 | 56.0% | 0.04 | 0.0006 | -0.209 | 1,220 | 311.05 | 321.80 | 53 | -0.98 | 0.0008 | -0.209 | ||
| 2.12 | 2.25 | 2 | 780 | 56.5% | 0.04 | 0.0006 | -0.200 | 1,230 | 321.00 | 332.35 | 43 | -0.98 | 0.0007 | -0.194 | ||
| 2.03 | 2.13 | 7 | 440 | 57.3% | 0.04 | 0.0005 | -0.191 | 1,240 | 330.90 | 343.45 | 34 | 56.3% | -0.98 | 0.0007 | -0.173 | |
| 1.91 | 1.97 | 179 | 1,899 | 57.8% | 0.04 | 0.0005 | -0.183 | 1,250 | 340.90 | 352.05 | 106 | -0.98 | 0.0006 | -0.168 | ||
| 1.75 | 1.85 | 19 | 576 | 58.2% | 0.03 | 0.0005 | -0.175 | 1,260 | 350.85 | 363.60 | 66 | 59.4% | -0.99 | 0.0005 | -0.166 | |
| 1.68 | 1.77 | 12 | 668 | 58.9% | 0.03 | 0.0004 | -0.168 | 1,270 | 360.85 | 372.00 | 51 | -0.99 | 0.0005 | -0.163 | ||
| 1.59 | 1.66 | 25 | 597 | 59.5% | 0.03 | 0.0004 | -0.162 | 1,280 | 370.80 | 382.00 | 80 | -0.99 | 0.0004 | -0.156 | ||
| 1.51 | 1.56 | 25 | 601 | 60.0% | 0.03 | 0.0004 | -0.156 | 1,290 | 380.80 | 393.60 | 6 | 64 | 62.5% | -0.99 | 0.0004 | -0.149 |
| 1.42 | 1.48 | 259 | 4,670 | 60.6% | 0.03 | 0.0004 | -0.150 | 1,300 | 390.80 | 402.25 | 502 | 1,095 | -0.99 | 0.0004 | -0.143 | |
| 1.36 | 1.41 | 124 | 593 | 61.2% | 0.03 | 0.0004 | -0.145 | 1,310 | 400.80 | 412.05 | 1 | 1 | -0.99 | 0.0003 | -0.132 | |
| 1.28 | 1.37 | 33 | 679 | 61.9% | 0.02 | 0.0003 | -0.140 | 1,320 | 410.80 | 422.05 | -1.00 | 0.0003 | -0.119 | |||
| 1.22 | 1.28 | 58 | 655 | 62.3% | 0.02 | 0.0003 | -0.135 | 1,330 | 420.00 | 432.00 | 9 | -1.00 | 0.0002 | -0.117 | ||
| 1.17 | 1.24 | 7 | 403 | 63.0% | 0.02 | 0.0003 | -0.131 | 1,340 | 430.75 | 443.60 | 67.6% | -1.00 | 0.0002 | -0.117 | ||
| 1.11 | 1.17 | 146 | 7,660 | 63.5% | 0.02 | 0.0003 | -0.126 | 1,350 | 440.75 | 452.80 | -1.00 | 0.0002 | -0.117 | |||
Strike mostrati: entro ±50% del prezzo del sottostante. Valore intrinseco = max(0, prezzo − strike) per le call, max(0, strike − prezzo) per le put; estrinseco = prezzo dell'opzione − intrinseco. Greche e IV calcolate dal feed della borsa.
Volatility smile — Nov 20, 2026
Pagina della volatilità →Volatilità implicita per strike per questa scadenza. I put out-of-the-money prezzano solitamente una IV più alta rispetto alle call — lo skew.