SharpLink Gaming (SBET), a Nasdaq-listed ether (ETH) treasury firm helmed by Ethereum co-founder Joe Lubin, said on Tuesday it has bough back $15 million worth of shares, noting the stock's market cap is below the company's$3.6 billion in ETH holdings. The Minneapolis-based firm repurchased about 939,000 shares at an average price of $15.98 as part of its share buyback program, according to a press release. "The Company believes its common stock is significantly undervalued in the market and believes bu ...