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BOSTON (

TheStreet

) -- TheStreet.com's "Under the Radar" series profiles small-cap companies from the belief that stocks that aren't covered by investment-bank analysts may be overlooked and, therefore, present untapped value.

We picked eight stocks during week one of the series, which started May 19. Here are the companies and their returns since recommendation. The benchmark

S&P 500 Index

has risen 13% during that period.

Pervasive Software

( PVSW): +6%.

Quality Systems

(QSII)

: +1%.

Pegasystems

(PEGA) - Get Pegasystems Inc. Report

: +30%.

Tyler Technologies

(TYL) - Get Tyler Technologies, Inc. Report

TheStreet Recommends

: little-changed.

NVE Corp.

(NVEC) - Get NVE Corporation Report

: +35%.

Ebix

(EBIX) - Get Ebix, Inc. Report

: +86%.

Open Text

(OTEX) - Get Open Text Corporation Report

: +19%.

Synaptics

(SYNA) - Get Synaptics Incorporated Report

: -32%.

Several of those stocks posted outstanding returns over a short period. It's unreasonable to expect further dramatic gains. Our most recent strategy recommendation, originally voiced in a Sept. 18

article

, is to take profits on winning stocks and keep them on your watch list.

Top-performing picks, such as Ebix, NVE and Pegasystems, are outstanding investments, but their stocks have been bid up to excessive valuations. Locking in profits and buying back in at a cheaper price is a logical course of action.