Effective May 1, the Nasdaq changed its seasoning rules to allow a fast entry for any IPO ranked among the top 40 by market cap on the index.
The Nasdaq Composite sank by more than 1,000 points on Friday, pushing the week down 4.68 percent.
Small-cap stocks are also outperforming, as the Russell 2000 eyes 3,000.
Lower bond yields and strong tech earnings drove further gains.
The clampdown hits a route that Chinese investors use to trade U.S. and Hong Kong stocks, raising capital-control and other concerns.
The rallies come despite elevated bond yields and signs of an economic slowdown.