Here is an example of my data:

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input str15 Equity double(B C D E F G H)
"ENSV US Equity" .1394 .1171              .2198              .1531              .1725               .205              .1387
"GNMX US Equity" .1659 .1659              .1659              .1659              .1659              .1659              .1659
"SITO US Equity" .1888 .1912                .16              .1799               .205                .17                .15
"AXAS US Equity"   .19  .121              .3147              .1942              .2334               .202              .1919
"ZOM US Equity"    .22 .1897                .17              .1577              .2379              .1581              .1087
"MVIS US Equity" .2542 .1725              .3499              .8799 1.3599999999999999               2.02               1.58
"XELA US Equity"  .257  .205               .355              .3248              .5542              .5103              .4279
"TTNP US Equity" .2631  .233              .2585              .2833              .3062               .291              .2308
"GNUS US Equity" .2815 .2822              .2991               2.05               2.25               1.46               1.07
"NTEC US Equity" .2988  .197                .25               .287              .2833              .4187               .308
"KMPH US Equity"  .303  .225                 .3              .1876              .2868               .416              .7299
"TRNX US Equity" .3031 .1601              .1951              .0806              .0848              .0665               .034
"HTBX US Equity"   .33   .57              .5698               1.02              .8427               2.17               1.26
"TGB US Equity"   .351 .2671               .344              .3971               .495               .645                .96
"WTRH US Equity" .3594  1.23               1.34 2.4699999999999998               2.63               5.34               4.03
"IDEX US Equity" .3605  1.34              .6024              .3938               2.01               1.47               1.28
"NXTD US Equity" .3699   .35                .46              .3891              .5041               .487               .386
"TMDI US Equity" .3702   .27               .297              .2668               .835                .92               .787
"ASM US Equity"  .3867   .34              .4048                .69                .81               1.06               1.18
"IFMK US Equity"  .389  1.49               1.29               1.06               1.07              .9274              .9384
"UAMY US Equity"   .41 .3306                .36              .3339                .49              .4001              .4992
"DFFN US Equity" .4122 .3166               .503                1.3               .975               1.15              .9795
"ACST US Equity" .4281 .3795                .61               .633              .4691                .76              .2447
"ONTX US Equity" .4298  .303              .3149              .4176              .5661               1.15              .2407
"UAVS US Equity" .4458 .4107               1.45               1.19               1.19               2.77                3.1
"GRNQ US Equity"  .449 .3763                .37               1.45 1.6600000000000001              .8752               1.11
"OCGN US Equity"   .45 .2811               .313                .31              .2204              .5151              .3482
"GLBS US Equity" .4501 .6051              .7186              .6666               .267               .143              .1352
"GPL US Equity"  .4581 .3082              .4684              .4334                 .5              .8198               .988
"AIHS US Equity" .4601 .4377               .375              .4086              .7358              .6819               .461
"WYY US Equity"  .4624  .366              .4395                .57              .6955              .7054               .515
"CHFS US Equity"   .47   .44              .4058               .375              .4788              .8493              .3672
"NAKD US Equity" .4722   .54              .7225               .625              .6526              .4529                .26
"LPCN US Equity" .4965   .48              .5537              .9136               1.26               1.54               1.48
"LODE US Equity"    .5 .4051              .5115              .5779              .9499               .805 1.1400000000000001
"PTN US Equity"  .5107 .4236              .4845              .5069               .512              .5766              .5527
"AYTU US Equity"   .53   1.5 1.6400000000000001               1.49               1.42 1.3900000000000001               1.06
"CBL US Equity"  .5308 .2001               .289              .3004              .2726              .1828               .186
"SPHS US Equity" .5354   .27              .2567              .0093              .0092              .0104               .011
"WRN US Equity"  .5466 .3943               .657              .7901              .8719               1.15               1.28
"TEUM US Equity"   .56  .412              .6338              .4361              .6201               .697                .68
"ADMP US Equity" .5652 .3573                .52              .4931               .537               1.18                .66
"JAGX US Equity"   .57 .4801               .456              .4831              .4849              .6538                 .4
"HTGM US Equity"   .58  .325                .37              .5299                .72              .6639                .37
"ALRN US Equity" .5847  .332              .5458               1.62               1.18                .88               1.28
end
Variables B,C,D,E,F,G and H are dates. I need to create a single date variable, which has the same 7 dates for each US Equity, and a single column for the stock price, which is what the number values represent in the data example. Here is an example of how the first few rows would look like:
Equity Date Stock_Price
ENSV US Equity B 0.1394
ENSV US Equity C 0.1171
ENSV US Equity D 0.2198
ENSV US Equity E 0.1531
ENSV US Equity F 0.1725
ENSV US Equity G 0.205
ENSV US Equity H 0.1387
GNMX US Equity B 0.1659
GNMX US Equity C 0.1659
GNMX US Equity D 0.1659
GNMX US Equity E 0.1659
GNMX US Equity F 0.1659
GNMX US Equity G 0.1659
GNMX US Equity H 0.1659

Any help will be much appreciated!!