Graybug Vision Inc.'s stock GRAY, +3.12% started its public life with a rally, as it opened 18.8% above its initial public offering price. The first trade was at $19.00 at 12:15 p.m. Eastern for 293,572 shares, above the upsized IPO price of $16 a share. At the IPO price, the California-based biopharmaceutical company raised $90 million and was valued at $306.5 million. The stock has pared some gains since it opened, to be trading 7.5% above its IPO price. The company went public at a time that the Renaissance IPO ETF IPO, +4.09% has rallied 63.0% year to date, while the S&P 500 SPX, +1.59% has edged up 1.1%.

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