Subject: Re: new screen based on Nasdaq100
All but a few stocks in gtr1 are in these exchanges:

excd.a   Definition
  1      NYSE
  2      NYSE MKT (AMEX in SIP)
  3      NASDAQ
  4      NYSE Arca
  5      Mutual Funds (as quoted by NASDAQ)

Count of stocks in gtr1 for these exchanges:

  Date    Active  excd=1  excd=2  excd=3  excd=4  excd=5
19291231    720     720     0       0       0       0
19391229    781     781     0       0       0       0
19491230    990     989     0       0       0       0
19591231   1087    1087     0       0       0       0
19691231   2316    1291    1025     0       0       0
19791231   4819    1537     862    2420     0       0
19891229   6813    1671     891    4250     0       0
19991231   8363    2789     764    4810     0       0
20091231   6558    2403     517    2849     789     0
20191231   7583    2413     255    3128    1455     332
20250522   9975    2305     266    4164    2286     954