* Cisco top stock on S&P, Nasdaq indexes after results
* Banks stocks drop for first time in six days
* Wells Fargo biggest drag on S&P after rating cut
* Indexes down: Dow 0.09 pct, S&P 0.22 pct, Nasdaq 0.22 pct (Updates to early afternoon)
By Yashaswini Swamynathan
Feb 16 (Reuters) - Wall Street dipped on Thursday, weighed down by energy stocks as oil prices dropped and as banks shares fell for the first time in six days.
The three main indexes had inched up enough at the open to notch record intraday highs for the sixth straight session. The rally was sparked by President Donald Trump's vow last week of tax cuts, and fueled by optimism that his plans for corporate deregulation will expand the economy.
However, worries have started to surface that Trump so far has provided no substantial details on his plans.
"Some of these policies are game changers to certain sectors, and the market is being somewhat rational in terms of taking a bit of a breather before we have more facts as opposed to plans or intention," said Tracy Maeter, global investment specialist at J.P. Morgan Private Bank in Philadelphia.
"I would expect that we are going to be in this mode in terms of taking two steps forward and one step back."
At 12:30 p.m. ET (1730 GMT), the Dow Jones Industrial Average was down 18.05 points, or 0.09 percent, at 20,593.81, and the Nasdaq Composite was down 12.63 points, or 0.22 percent, at 5,806.81.
The S&P 500 was down 5.17 points, or 0.22 percent, at 2,344.08. The index ended higher for the seventh session in a row on Wednesday, its first such streak since September 2013.
Seven of the 11 major S&P sectors were lower. The biggest drags were the financials, which fell 0.41 percent, and energy, which dropped 0.83.
The technology index edged up 0.16 percent, buoyed by Cisco's 2.9 percent gain after its results. The stock was the top boost to the S&P and the Nasdaq.
Wells Fargo was the biggest drag on the S&P, slipping 1.2 percent after Credit Suisse downgraded its stock to "neutral" from "outperform".
TripAdvisor sank 9.3 percent and was the biggest percentage loser on the S&P and Nasdaq 100 after posting lower-than-expected quarterly revenue and profit.
NetEase jumped 12 percent to $293.06 following the Chinese online game developer's revenue beat.
Declining issues outnumbered advancers on the NYSE by 1,829 to 1,033. On the Nasdaq, 1,781 issues fell and 988 advanced.
The S&P 500 index showed 50 new 52-week highs and no new lows, while the Nasdaq recorded 117 new highs and 21 new lows. (Reporting by Yashaswini Swamynathan in Bengaluru; Editing by Savio D'Souza)