what is the most performance mid cap stock between january 1 1999 and december 25 1999

Viavi Solutions (VIAV) had the highest return between January 1, 1999 and December 25, 1999 by a mid-cap US stock, returning 726.5%.

ASSETDATE% RETURN
Viavi Solutions (VIAV)
1/1/1999 - 12/25/1999
726.52%
Stonex (SNEX)
1/1/1999 - 12/25/1999
569.93%
Qorvo (QRVO)
1/1/1999 - 12/25/1999
487.43%
InterDigital (IDCC)
1/1/1999 - 12/25/1999
443.59%
ViaSat (VSAT)
1/1/1999 - 12/25/1999
430.12%
Grupo Simec SAB de CV ADR (SIM)
1/1/1999 - 12/25/1999
305.1%
Vicor (VICR)
1/1/1999 - 12/25/1999
304.06%
SK Telecom Co Ltd ADR (SKM)
1/1/1999 - 12/25/1999
302.56%
BlackBerry (BB)
1/1/1999 - 12/25/1999
283.22%
Diodes (DIOD)
1/1/1999 - 12/25/1999
273.19%
Power Integrations (POWI)
1/1/1999 - 12/25/1999
272.5%
Sharplink Gaming (SBET)
1/1/1999 - 12/25/1999
229.03%
Gerdau SA ADR (GGB)
1/1/1999 - 12/25/1999
218.94%
Patterson-UTI Energy (PTEN)
1/1/1999 - 12/25/1999
189.41%
Semtech (SMTC)
1/1/1999 - 12/25/1999
188.5%
Telephone and Data Systems (TDS)
1/1/1999 - 12/25/1999
173.39%
ePlus (PLUS)
1/1/1999 - 12/25/1999
170%
Trex (TREX)
1/1/1999 - 12/25/1999
163.75%
WPP PLC ADR (WPP)
1/1/1999 - 12/25/1999
161.18%
Array Digital Infrastructure (AD)
1/1/1999 - 12/25/1999
160.26%
United States Cellular (USM)
1/1/1999 - 12/25/1999
160.23%
Vishay Intertechnology (VSH)
1/1/1999 - 12/25/1999
148.92%
Korn Ferry (KFY)
1/1/1999 - 12/25/1999
145.57%
Onto Innovation (ONTO)
1/1/1999 - 12/25/1999
143.65%
Bio-Techne (TECH)
1/1/1999 - 12/25/1999
143.19%
Mid-cap stocks are treated as having a market cap between $2B and $10B.