PDEX vs. MAIN

Last updated Apr 9, 2026

PDEX (Pro-Dex, Inc.) is a stock, while MAIN (Main Street Capital Corporation) is a stock. Over the past 10 years, PDEX returned 29.97%/yr vs 14.31%/yr for MAIN. At 0.09, their price movements are largely independent.

Performance

PDEX vs. MAIN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Pro-Dex, Inc. (PDEX) and Main Street Capital Corporation (MAIN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PDEX achieves a 27.26% return, which is significantly higher than MAIN's -7.83% return. Over the past 10 years, PDEX has outperformed MAIN with an annualized return of 29.97%, while MAIN has yielded a comparatively lower 14.31% annualized return.

PDEX

• 1D: -1.63%
• 1M: 9.06%
• YTD: 27.26%
• 6M: 40.96%
• 1Y: -10.92%
• 3Y*: 42.57%
• 5Y*: 12.74%
• 10Y*: 29.97%

MAIN

• 1D: 1.21%
• 1M: -3.31%
• YTD: -7.83%
• 6M: -6.80%
• 1Y: 18.90%
• 3Y*: 20.82%
• 5Y*: 14.01%
• 10Y*: 14.31%

*Multi-year figures are annualized to reflect compound growth (CAGR)

PDEX vs. MAIN - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PDEX Pro-Dex, Inc.	27.26%	-17.69%	166.84%	10.19%	-31.50%	-25.06%	76.47%	45.28%	77.65%	44.68%
MAIN Main Street Capital Corporation	-7.83%	10.74%	47.30%	28.22%	-11.37%	48.31%	-19.54%	36.88%	-8.27%	16.62%

Correlation

The correlation between PDEX and MAIN is 0.10, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.10
Correlation (3Y) Calculated over the trailing 3-year period	0.10
Correlation (5Y) Calculated over the trailing 5-year period	0.13
Correlation (All Time) Calculated using the full available price history since Oct 10, 2007	0.09

Fundamentals

Market Cap PDEX : $161.80M MAIN : $4.89B
EPS PDEX : $3.40 MAIN : $5.14
PE Ratio PDEX : 14.39 MAIN : 10.58
PEG Ratio PDEX : 0.17 MAIN : 5.10
PS Ratio PDEX : 2.26 MAIN : 8.59
PB Ratio PDEX : 3.89 MAIN : 1.63
Total Revenue (TTM) PDEX : $72.10M MAIN : $566.39M
Gross Profit (TTM) PDEX : $20.40M MAIN : $435.68M
EBITDA (TTM) PDEX : $17.37M MAIN : $383.65M

Return for Risk

PDEX vs. MAIN — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

PDEX

PDEX Risk / Return Rank: 30
PDEX Sharpe Ratio Rank: 26
PDEX Sortino Ratio Rank: 28
PDEX Omega Ratio Rank: 29
PDEX Calmar Ratio Rank: 34
PDEX Martin Ratio Rank: 34

MAIN

MAIN Risk / Return Rank: 53
MAIN Sharpe Ratio Rank: 58
MAIN Sortino Ratio Rank: 51
MAIN Omega Ratio Rank: 49
MAIN Calmar Ratio Rank: 53
MAIN Martin Ratio Rank: 54

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

PDEX vs. MAIN - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Pro-Dex, Inc. (PDEX) and Main Street Capital Corporation (MAIN). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	PDEX	MAIN	Difference
Sharpe ratio Return per unit of total volatility	-0.15	0.81	-0.96
Sortino ratio Return per unit of downside risk	0.31	1.28	-0.97
Omega ratio Gain probability vs. loss probability	1.05	1.15	-0.11
Calmar ratio Return relative to maximum drawdown	-0.06	0.70	-0.75
Martin ratio Return relative to average drawdown	-0.09	1.69	-1.78
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PDEX vs. MAIN - Sharpe Ratio Comparison

The current PDEX Sharpe Ratio is -0.15, which is lower than the MAIN Sharpe Ratio of 0.81. The chart below compares the historical Sharpe Ratios of PDEX and MAIN, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	PDEX	MAIN	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.15	0.81	-0.96
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.22	0.67	-0.45
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.51	0.53	-0.02
Sharpe Ratio (All Time) Calculated using the full available price history	0.09	0.58	-0.49

Drawdowns

PDEX vs. MAIN - Drawdown Comparison

The maximum PDEX drawdown since its inception was -95.50%, which is greater than MAIN's maximum drawdown of -64.53%. Use the drawdown chart below to compare losses from any high point for PDEX and MAIN.

Drawdown Indicators

	PDEX	MAIN	Difference
Max Drawdown Largest peak-to-trough decline	-95.50%	-64.53%	-30.97%
Max Drawdown (1Y) Largest decline over 1 year	-65.36%	-20.22%	-45.14%
Max Drawdown (5Y) Largest decline over 5 years	-65.36%	-27.06%	-38.30%
Max Drawdown (10Y) Largest decline over 10 years	-69.11%	-64.53%	-4.58%
Current Drawdown Current decline from peak	-29.03%	-15.40%	-13.63%
Average Drawdown Average peak-to-trough decline	-63.98%	-7.21%	-56.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	40.34%	8.35%	+31.99%

Volatility

PDEX vs. MAIN - Volatility Comparison

Pro-Dex, Inc. (PDEX) has a higher volatility of 13.72% compared to Main Street Capital Corporation (MAIN) at 7.63%. This indicates that PDEX's price experiences larger fluctuations and is considered to be riskier than MAIN based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PDEX	MAIN	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.72%	7.63%	+6.09%
Volatility (6M) Calculated over the trailing 6-month period	47.98%	17.87%	+30.11%
Volatility (1Y) Calculated over the trailing 1-year period	74.81%	23.65%	+51.16%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	58.93%	20.95%	+37.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	58.49%	26.96%	+31.53%

Dividends

PDEX vs. MAIN - Dividend Comparison

PDEX has not paid dividends to shareholders, while MAIN's dividend yield for the trailing twelve months is around 7.85%.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PDEX Pro-Dex, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MAIN Main Street Capital Corporation	7.85%	7.00%	7.02%	8.55%	7.97%	5.74%	6.99%	6.76%	8.43%	7.49%	7.42%	9.15%

Financials