Do you remember how much stocks went down when the first dot-com bubble burst? Well, it is happening again, and tech stocks are already down more than half a trillion dollars since the middle of 2015. On Friday, the tech-heavy Nasdaq dropped to its lowest level in more than 15 months, and it has now fallen more than 16 percent from the peak of the market.But of course some of the biggest names have fallen much more than that.Netflix (NFLX) is down 37 percent, Yahoo (YHOO) is down 39 percent, LinkedIn (LNKD) is down 60 percent, and Twitter (TWTR) is down more than 70 percent.If you go back through my previous articles, you will find that I specifically warned about Twitter again and again.Irrational financial bubbles like this always burst eventually, and many investors that got in at the very top are now losing extraordinary amounts of money.

On Friday, tech stocks got absolutely slammed as the bursting of dot-com bubble 2.0 accelerated once again.The following is how CNBC summarized the carnage…

The Nasdaq composite fell 3.25 percent, as Apple and theiShares Nasdaq Biotechnology ETF (IBB) dropped 2.67 percent and 3.19 percent, respectively.

Also weighing on the index were Amazon and Facebook, which closed down 6.36 percent and 5.81 percent, respectively.

LinkedIn shares also tanked 43.63 percent after posting weak guidance on their quarterly results.

Overall, LinkedIn is now down a total of 60 percent from the peak of the market.But they are far from the only ones that have already seen their bubble burst.

Many of the biggest names in the tech world have gotten mercilessly hammered over the past six months of so.Just look at some of the famous brands that have already lost 60 percent of their market caps…

Yahoo (YHOO) shares are off 39%, and Netflix (NFLX), the best-performing stock in the S&P 500 last year, is now off by37% from its 52-week high.

Likewise, Priceline.com (PCLN) is off 31% and eBay (EBAY),22%.