The short interest in PG&E (PCG) increased 20% as of November 30. The total shorted shares in PG&E were 9.0 million on November 15, while the total shorted shares increased to 10.9 million as of November 30. An increase in the short interest could indicate that more investors expect PG&E to fall from the current price levels. The short interest is the number of shares that are sold short and not covered yet. The short interest measures investors’ anxiety.