There seems to be a "pretty significant turnaround" with November seeing buyers come back into the market place, he said.
Synlait rose 2.9 per cent to $8.76. Other companies to garner buying interest included Spark New Zealand, the shares of which rose 2.3 per cent to $4.07. Kathmandu Holdings added 3.2 per cent at $2.90.
Orion Health Group was up 1.8 per cent to $1.16. Yesterday, the technology company raised the likely price range for its planned buyback to $1.20 to $1.25 from $1.16 to $1.26, following the completion of the sale of its Rhapsody unit to UK private equity firm Hg for $205 million.
Contact Energy added 0.9 per cent to $5.65. Earlier the company said its operating earnings during the past four months are ahead of last year. It generated 3,158 GWh of electricity in the four months through October, about 8 per cent more than the year before. Average prices for that output were 55 per cent higher at $133.42 per megawatt hour.
Genesis Energy added 0.2 per cent to $2.41. Mercury NZ dipped 0.7 per cent to $3.405 and Meridian Energy fell 1.4 per cent to $3.115.
Williamson said gains were pretty much across the board with the exception of a handful of stocks.
Ryman Healthcare fell 3.3 per cent to $12.20 but he said there was no specific driver behind the move. "It's just a few sellers came back in," he said. The same was true for SkyCity Entertainment, which fell 3.4 per cent to $3.72.
Z Energy bounced slightly after sharp falls since it rattled investors last Thursday with a 21 per cent drop in first-half earnings and a dividend about five cents less than they were expecting. The stock added 1.9 per cent to $5.28.
While investors will be keeping one eye on domestic news, such as labour data tomorrow and the central bank's monetary policy statement Thursday, Williamson said the main focus is offshore.
US congressional midterm elections are of particular interest but tough to call, he said. Results are due Wednesday in New Zealand The Democratic Party may win back control of the House of Representatives with the Republicans likely to keep the Senate.
If that's the case, it may not be viewed as positive for markets at it will make progress on policy more difficult, he said.