It's a Friday ahead of a holiday, so traders were few and volume was thin in after-hours trading on Island and Instinet. Still, some diehards were getting in some action before the three-day weekend.

Just take a look at

BroadVision

(BVSN) - Get Report

, which was keeping its regular-trading session rally going on anticipation that Tuesday the company will announce a new wireless venture. On Island, the stock was lately up $1.44 to $40.50, while on Instinet its gains were a little less, up $1.39 to $40.45. At the closing bell, BroadVision was up $4.56, or 13.2%, to $39.06.

Earlier this week, the company announced that it was entering into an alliance with India-based software services firm

Mastek

. The venture will build e-business applications.

Instinet action had

Global Crossing

(GBLX)

as its most active stock, but it was down 6 cents to $35.06 after gaining $5.06 to $35.13 in regular trading hours. The stock got a boost after it increased revenue estimates for the entire year.

Also on Instinet, the biggest loser was

iXL Enterprises

(IIXL)

which warned that it expected a third-quarter loss and lower revenue for the same quarter. The seven-analyst estimate predicted earnings of 4 cents a share. The company was down $1.64, or about 20%, to $6.73 on 3,300 shares.

On the other end of the spectrum was

Covalent

(CVGR)

which was up $2.03, or 61%, to $5.38. No news here, just light volume (only 500 shares).

Tonight,

Symphonix

(SMPX)

was a little out of tune. It was lately the object of profit-taking, down $1.60, or 16%, to $8.40 on Island. Instinet traders were a bit kinder, only cutting the stock by $1.06 to $8.44. It ended today's regular session up a whopping $4.34, or 84%, to $9.50.

Yesterday, the stock was the after-hours darling after the

Food and Drug Administration

approved Symphonix's surgically implanted hearing device for adults with moderate to severe hearing loss. The stock swelled to a melodious $6.75 from its closing price of $5.16.

Investors were liking the news that

TST Recommends

BEI Medical Systems

(BMED)

will feature one of its devices at the

16th FIGO World Congress of Gynecology and Obstetrics

.

The product, called the Hydro ThermAblator, is a minimally invasive, nonsurgical method for treating excessive uterine bleeding. The stock was lately up 16 cents to $1.91. It ended the regular session up 69 cents, or 65%, to $1.75.

Yesterday,

Wind River

(WIND)

made an announcement after the closing bell that it beat analysts' estimates. Today, it was still getting some action, albeit not of the positive kind. On Island, the stock was lately sliding 81 cents to $47.44 after gaining $7.50, or 18.4%, to $48.25 in regular trading hours.

Remember

Immersion

(IMMR) - Get Report

? We do. Just last night,

TSC

featured the hardware and software manufacturer in

this column, because it was the largest gainer on

Instinet

in extended trading.

In fact, Immersion did gain $12.13, or 70.8%, to $29.25 in the after-hours session, with only 800 shares changing hands on Instinet. Today, the company closed up 2.2% to $17.50 in regular trading. Clearly, someone got duped into paying a hugely inflated price for the stock in nighttime trading. And, apparently, he or she was burned. For the novice after-hours investor, this story serves as a cautionary tale.

In a similar vein, look at

On-Point Technology

(ONPT)

, which was getting lots of action lately on no news. Thin volume and a couple of impish traders were pushing the stock up what would be an impressive 50%, but the stock trades under $1. Any kind of action will make it move big. It finished the regular trading session up 3 cents, or 7.7%, to 44 cents.

This information is provided by Instinet, a wholly owned subsidiary of Reuters (RTRSY) . For further information, please contact Instinet at www.instinet.com.

Island ECN, owned by Datek Online, offers trading, mainly in Nasdaq-listed stocks, from 7 a.m. to 8 p.m. EDT.

Confused?

TheStreet.com

explains how the rules change when the sun goes down in Investing Basics: Night Owl, a section devoted to after-hours trading.