UnitedHealth Group ( UNH) ($61.59) is a recent downgrade to hold from buy in the medical sector that's 9.5% overvalued. The stock set a multi-year high at $63.95 on April 2. The weekly chart is positive with the five-week MMA at $58.62. My semiannual value level is $59.89 with a quarterly risky level at $63.66, which was tested at that April 2 high, then came the downgrade. Union Pacific ( UNP) ($135.76) is a hold rated stock in the transportation sector which is 18.5% overvalued and considered an "avoid-source of funds" as 78% of all stocks in this sector are rated strong sell or sell. The stock set a multi-year high at $143.00 on March 28. The weekly chart profile shifts to negative on a close this week below the five-week MMA at $138.14. My quarterly value level is $134.57 with a monthly pivot at $136.29 and weekly risky level at $142.19, and quarterly risky level at $143.14. Verizon Communications ( VZ) ($50.64) is a buy rated stock in the utilities sector which is 10.8% overvalued. The stock traded to a new multi-year high at $51.05 as stocks declined on Monday. The weekly chart profile is positive but extremely overbought with the five-week MMA at $48.69. My quarterly value level is $46.78 with a weekly risky level at $52.83. At the time of publication the author held no positions in any of the stocks mentioned.Follow @SuttmeierThis article is commentary by an independent contributor, separate from TheStreet's regular news coverage.