Boston Scientific (BSX) loses 14 cents to $5.55 and options volume on the medical device-maker is 2X the daily average, being driven by Oct 6 call buyers. A multi-exchange sweep of 4,552 traded for 6 cents when the market was 4 to 6 cents. Another 2,057 BSX Oct 6 calls traded at an average of 4.7 cents when the market was 2 to 4 cents. Volume is now 7,308 against 2,901 in open interest. Implied volatility in BSX options is moving as well, up 13 percent to 55.5 ahead of earnings. The company is due to report earnings the morning of Oct 20 and the day before October expiration Friday.

*Scanning all single-stocks subject to 2500 contracts minimum call or put volume

Sprint (S) sees a modest spike and is up 5 cents to $2.84 midday after David Einhorn apparently made positive comments about the company at a value investing conference (Briefing). Overall options volume in Sprint so far is 22,000 contracts, which is much lighter than usual. However, the action is lopsided, as 17,000 calls and 4,660 puts traded on the stock. Recent trades include multi-exchange sweeps of Oct 3 calls at 8 and 9 cents. 11,275 now traded (74% Ask), as some investors seem to be looking for a rally beyond $3 in Sprint shares before the expiration, which represents a 6 percent jump over the next four days. The stock, which fell to 52-week lows of $2.22 a week ago, is already on a five-day 27 percent run higher. The company reported its best ever one day sales Friday on strong sales of iPhone 4s and iPhone 4.

*Scanning all single-stocks subject to 2500 contracts minimum call or put volume

BofA (BAC) loses 8 cents to $6.11 and seems set to test its previous $6 support level ahead of tomorrow’s earnings release. $6 was a support area in September, but that level gave way on Oct 3 and BAC fell to $5.13 intraday on Oct 4. It is up 19.1 percent from that level and now focus turns to earnings. Shares are down ahead of the news, but overall options volume is running lighter than usual. 68,000 calls and 42,000 puts traded on the bank so far. Early trades include a multi-exchange sweep of 11,212 Oct 7 calls at 6-cent asking price. ISEE is reporting an opening customer buyer. 33,684 contracts now traded. Oct 7 calls on BofA are 14.6 percent OTM with a .13 delta and expiring at the end of the week. The stock last traded north of $7 on Sep 20.