For tech companies, going public is often fraught with pressure — they’re suddenly expected to deliver positive news every quarter, and they might push innovation to the wayside in the quest to become profitable. They should soon have a better alternative, though. The SEC has approved the creation of the Long-Term Stock Exchange, a Silicon Valley-based platform aimed at tech startups that want to go public while taking their time to develop products and services. The exchange will have rules to limit executive bonuses, require more disclosure for milestones and reward long-term shareholders with more voting power.