Supercom (SPCB) had the highest return in March 2013 by a US stock, returning 566.7%.

ASSET	MONTH	% RETURN
Supercom (SPCB)	March 2013	566.67%
Cosmos Health (COSM)	March 2013	550%
Ryvyl (RVYL)	March 2013	233.33%
Predictive Oncology (POAI)	March 2013	136.67%
Actinium Pharmaceuticals (ATNM)	March 2013	136%
Optex Systems Holdings, Inc Common Stock (OPXS)	March 2013	100%
SemiLEDS (LEDS)	March 2013	86.49%
Duos Technologies (DUOT)	March 2013	81.25%
Immersion (IMMR)	March 2013	80.61%
Soluna (SLNH)	March 2013	77.78%
IZEA (IZEA)	March 2013	76.92%
Himax Technologies (HIMX)	March 2013	70.76%
Applied DNA Sciences (APDN)	March 2013	69.63%
Vivakor (VIVK)	March 2013	69.23%
Turtle Beach (HEAR)	March 2013	68.35%
Quantum Computing (QUBT)	March 2013	68.32%
GT Biopharma (GTBP)	March 2013	66.67%
Park Ohio (PKOH)	March 2013	64.74%
MGIC Investment (MTG)	March 2013	62.3%
Entravision Communications (EVC)	March 2013	61.11%
SurgePays (SURG)	March 2013	60%
Ambarella (AMBA)	March 2013	58.82%
Regulus Therapeutics (RGLS)	March 2013	52.86%
Information Services (III)	March 2013	51.88%
Addus HomeCare (ADUS)	March 2013	51.61%