best performing mid stocks aug 1990 to sep 1990

Weatherford International (WFRD) had the highest return between August 1, 1990 and September 30, 1990 by a mid-cap US stock, returning 20.3%.

ASSETDATE% RETURN
Weatherford International (WFRD)
8/1/1990 - 9/30/1990
20.27%
White Mountains Insurance (WTM)
8/1/1990 - 9/30/1990
13.6%
California Water Service (CWT)
8/1/1990 - 9/30/1990
10.77%
Exponent (EXPO)
8/1/1990 - 9/30/1990
8.92%
Murphy Oil (MUR)
8/1/1990 - 9/30/1990
8.56%
National Fuel Gas (NFG)
8/1/1990 - 9/30/1990
8.3%
Tidewater (TDW)
8/1/1990 - 9/30/1990
7.09%
Otter Tail (OTTR)
8/1/1990 - 9/30/1990
6.4%
Sasol (SSL)
8/1/1990 - 9/30/1990
6.24%
OFG Bancorp (OFG)
8/1/1990 - 9/30/1990
3.58%
Spire (SR)
8/1/1990 - 9/30/1990
3.26%
Axogen (AXGN)
8/1/1990 - 9/30/1990
3.22%
Brinks (BCO)
8/1/1990 - 9/30/1990
2.16%
Federal Signal (FSS)
8/1/1990 - 9/30/1990
2.09%
Inter Parfums (IPAR)
8/1/1990 - 9/30/1990
1.56%
H2O America (HTO)
8/1/1990 - 9/30/1990
1.48%
Simmons First National (SFNC)
8/1/1990 - 9/30/1990
0.64%
IDACORP (IDA)
8/1/1990 - 9/30/1990
0.51%
CECO Environmental (CECO)
8/1/1990 - 9/30/1990
0%
Northwest Natural Gas (NWN)
8/1/1990 - 9/30/1990
0%
Avient (AVNT)
8/1/1990 - 9/30/1990
0%
Mercury General (MCY)
8/1/1990 - 9/30/1990
-0.46%
Molson Coors Brewing (TAP)
8/1/1990 - 9/30/1990
-0.48%
Trustmark (TRMK)
8/1/1990 - 9/30/1990
-0.54%
NewJersey Resources (NJR)
8/1/1990 - 9/30/1990
-0.69%
Mid-cap stocks are treated as having a market cap between $2B and $10B.