Yahoo (YHOO, news, chart) is seeing double normal trading volume. The stock is down 67 cents to $18.09 and touching a new 52-week low Thursday after JP Morgan analysts cut their forecasts for online advertising due to macroeconomic weakness. Biggest weakness is expected in the display advertising. In the options market, sentiment is leaning on the bullish side with 94,000 YHOO calls traded, and 7,000 puts. The day’s top trade includes a block of 50,000 YHOO October 30 calls traded offerside for 4 cents a contract.