Kalvista Pharmaceuticals Inc.’s chief development officer, Christopher Yea, said the across-the-board positive phase II top-line data with KVD-900 for on-demand use against hereditary angioedema (HAE) attacks will open “a very flexible discussion with regulators” regarding the design and endpoints of the phase III study to come with the oral kallikrein inhibitor. Shares of the Cambridge, Mass.-based firm (NASDAQ:KALV) closed at $33.50, up $17.89, or 115%, after reaching a high of $45, as Wall Street digested the findings.