 Shares of BioCardia Inc. sank 13.9 in morning trading Wednesday, after the developer of regenerative biologic therapies announced more stock sales in the wake of the 137.6 rocket ride over the past two days. The company said before Wednesdays open that it sold 2.04 million shares of its stock at 5.15 a share in a registered direct offering to raise 10.5 million, On Monday, the company said it sold 1.79 million shares at 4.75 a share in a registered direct offering to raise 8.5 million. 