@drtinvest We source the prices from the relevant exchanges, e.g. NASDAQ-listed EQs from NASDAQ themselves.
If I remember correctly, we suspended the stock on the 15th as it was also halted on NASDAQ due to extreme volatility. The company itself was also quite surprised, they even issued a statement: https://finance.yahoo.com/news/liberty-tripadvisor-holdings-issues-statement-225000879.html
As for the OTC question: Trading type newbie question
The best price isn’t always available on the exchanges, sometimes, it happens to be OTC (over-the-counter). If that’s the case, the order will be routed OTC.