PTIX vs SSKN

Comparison between Protagenic Therapeutics Inc (PTIX, Company) and STRATA Skin Sciences Inc (SSKN, Company).

Both PTIX and SSKN are from the Healthcare sector.

5-Year PerformanceSSKN has outperformed PTIX, delivering a return of -61.8% compared to -71.0%

PTIX vs SSKN - Performance Comparison

Log

Key Characteristics

Financial metrics and valuation ratios

Metric	PTIX(COMPANY)	SSKN(COMPANY)
Market Cap	$696K	$712K
Max Drawdown	99.98%	100.00%
Sharpe Ratio	-0.44	-0.68
Industry	Biotechnology	Medical Devices
P/E Ratio	-0.07	-0.08
Forward P/E	N/A	188.68
5Y EPS CAGR	9.80%	1.95%
Debt to Equity	0.00%	527.82%

Market Cap

PTIX

$696K

Winner

SSKN

$712K

Max Drawdown

Winner

PTIX

99.98%

SSKN

100.00%

Sharpe Ratio

Winner

PTIX

-0.44

SSKN

-0.68

Industry

PTIX

Biotechnology

SSKN

Medical Devices

P/E Ratio

PTIX

-0.07

Winner

SSKN

-0.08

Forward P/E

PTIX

N/A

SSKN

188.68

5Y EPS CAGR

Winner

PTIX

9.80%

SSKN

1.95%

Debt to Equity

Winner

PTIX

0.00%

SSKN

527.82%

PTIX vs SSKN - Historical Returns

Returns include dividend reinvestment.

Period	PTIX	SSKN
1 month	-34.08%	-13.42%
3 months	-52.01%	-47.64%
6 months	-72.84%	-89.35%
1 year	-90.70%	-94.40%
5 years(CAGR)	-71.03%	-61.78%
10 years(CAGR)	-54.11%	-42.37%
Max(CAGR)	-44.56%	-39.23%

PTIX

-34.08%

Winner

SSKN

-13.42%

PTIX

-52.01%

Winner

SSKN

-47.64%

Winner

PTIX

-72.84%

SSKN

-89.35%

Winner

PTIX

-90.70%

SSKN

-94.40%

5Y(CAGR)

PTIX

-71.03%

Winner

SSKN

-61.78%

10Y(CAGR)

PTIX

-54.11%

Winner

SSKN

-42.37%

Max(CAGR)

PTIX

-44.56%

Winner

SSKN

-39.23%

PTIX vs SSKN - Annual Returns (2005 - 2026)

Returns include dividend reinvestment.

Year	PTIX	SSKN
2026	-51.36%	-89.69%
2025	-82.13%	-56.70%
2024	-46.74%	-44.05%
2023	-39.63%	-31.25%
2022	-71.43%	-45.88%
2021	+31.90%	-0.34%
2020	-25.54%	-20.63%
2019	-29.49%	-27.02%
2018	-9.09%	+106.35%
2017	-71.55%	-45.33%
2016	+150.00%	-60.71%
2015	N/A	-31.06%
2014	N/A	-81.71%
2013	N/A	-63.43%
2012	N/A	-50.00%
2011	N/A	+10.48%
2010	N/A	-68.46%
2009	N/A	+158.40%
2008	N/A	-25.88%
2007	N/A	-34.92%
2006	N/A	+37.93%
2005	N/A	-30.87%

PTIX vs SSKN Drawdown Comparison

The maximum drawdown for PTIX was -99.98%, occurring on Feb 17, 2026. This drawdown has not yet recovered.

The maximum drawdown for SSKN was -100.00%, occurring on Apr 15, 2026. This drawdown has not yet recovered.

The current PTIX drawdown is -99.98%. The current SSKN drawdown is -100.00%.

Rank	PTIX	SSKN
#1	-99.98% Apr 6, 2016 - Feb 17, 2026	-100.00% Jan 14, 2010 - Apr 15, 2026
#2	-66.67% Jan 29, 2016 - Apr 6, 2016	-75.19% Jun 5, 2008 - Aug 24, 2009
#3	N/A	-53.03% Jun 7, 2006 - May 27, 2008
#4	N/A	-34.75% Nov 16, 2005 - Jun 5, 2006
#5	N/A	-33.85% Oct 28, 2005 - Nov 15, 2005
#6	N/A	-28.72% Oct 27, 2009 - Jan 14, 2010
#7	N/A	-14.57% Sep 10, 2009 - Oct 26, 2009
#8	N/A	-7.66% Aug 27, 2009 - Sep 9, 2009
#9	N/A	-2.58% May 30, 2008 - Jun 5, 2008