San Francisco's Yellow Cab Co-op has filed for bankruptcy, a few weeks after the first reports came out that it was on the verge of doing so. According to San Francisco Examiner, the biggest taxi company in the city blamed two things in the documents it submitted: 1.) lawsuits and 2.) ride-sharing services. Yellow Cab President Pamela Martinez wrote that the Co-op is self-insured unlike other cab companies. "On a short term basis, the ability to self-insure resulted in lower operating costs," the document read. "However, self-insurance exposed Yellow Cab to risks of catastrophic losses, which ultimately occurred."